Bone structur e is categorized into two main structures; compact bone and spongy bone, as shown in Figure 1. Skeletal System I. Spongy (Cancellous) Bone Like compact bone, spongy bone, also known as cancellous bone, contains osteocytes housed in lacunae, but they are not arranged in concentric circles. While the spongy bone tissue itself does not contain blood vessels, the surrounding marrow is full of capillaries, and helps transfer nutrients and other metabolic products from the blood to the bone tissue. Spongy bone is the only tissue to feature trabeculae made of bone. epiphysis: branching plates that form web-like appearance of spongy bone: trabeculae: what's found inside the spaces in spongy bone? blood vessels travel longitudinally through the Haversian canals. Compact bone or cortical bone is a hard-outer layer of long bone found in the diaphysis part. where bone elongation occurs. irregular connecting spaces between these plates help reduce the bone's weight. Lacunae = a cavity or … Location: are found in small, round cavities called lacunae and have thin, cytoplasmic branches. Share it! Natural Structures. the spongy bone. Where is the tibial sesamoid bone located? Apparenlty the middle of many bones is actually hollow! Bone marrow is a soft connective tissue that produces blood cells. Spongy bone consists of plates and bars of bone adjacent to small, irregular cavities that contain red bone marrow. Each epiphysis meets the diaphysis at the metaphysis, the narrow area that contains the epiphyseal plate (growth plate), a layer of hyaline (transparent) cartilage in a growing bone. Compact bones are heavy and tough as they store calcium in them, contributing to over 80% of total human skeleton weight. Each epiphysis meets the diaphysis at the metaphysis, the narrow area that contains the epiphyseal plate (growth plate), a layer of hyaline (transparent) cartilage in a growing bone. Trabeculae are characteristically ori- These two types are classified as on the basis of porosity and the unit microstructure. A long bone is a bone that has greater length than width. There are two parts to the skeleton: 1. Osteon, the chief structural unit of compact (cortical) bone, consisting of concentric bone layers called lamellae, which surround a long hollow passageway, the Haversian canal (named for Clopton Havers, a 17th-century English physician). Cortical bone ��� In addition to her role as a wiseGEEK editor, Niki enjoys educating herself about interesting What is an irregular bone in the human body? Also found in bones: Which of the following options is correct? © copyright 2003-2020 Study.com. sphenoid bone. I actually had a human anatomy and physiology lecture about this today. Like compact bone, spongy bone, also known as cancellous bone, contains osteocytes housed in lacunae, but they are not arranged in concentric circles. the canals are connected laterally by smaller canals called Volksmann's canal. extends between temples, floor of orbits, pituitary gland. Bone is part of the skeletal system that provides support and movement of the body, as well as protecting the organ inside the body. BiologyWise provides an in-depth study of the components, structure, and function of extracellular matrix. bones contain a series of bumps, holes, and ridges; are places where muscle, tendons and ligaments are attached, and bld … Like compact bone, spongy bone, also known as cancellous bone, contains osteocytes housed in lacunae, but they are not arranged in concentric circles. In birds and mammals, bone marrow is the primary site of new blood cell production or hematopoiesis. Earn Transferable Credit & Get your Degree, Get access to this video and our entire Q&A library. A long bone has a shaft and 2 ends. Thanks! However, their surface area is ten times larger than that of compact bones in the human skeleton. Osteoclast: Bone cell responsible for breaking down bone matrix. Long bone anatomy. It forms the relatively softer core of the bones that is filled with marrow. Spongy bone, on the other hand, is generally located inside some bones. Sciences, Culinary Arts and Personal The smallest bone, the stirrup bone, is one of three tiny bones buried within the middle ear; it is only 0.18 cm (0.07 in) long. What Is the Difference between Spongy and Compact Bone. Ethmoid bone. Instead, the lacunae and osteocytes are found in a lattice-like network of matrix spikes called trabeculae (singular = trabecula) ( Figure 6.13 ). The bone marrow fills up the open spaces between the trabeculae. The Clara cell is found in the terminal bronchioles. Instead, the lacunae and osteocytes are found in a lattice-like network of matrix spikes called trabeculae (singular = … Spongy bone is found on the inside of some bones, and it is surrounded by the stronger, more p… From palm trees with radial density gradients, to the spongy trabeculae structure of bone, to the hardness gradient found in many types of beaks, graded materials offer material and structural efficiency. The canaliculi connect to the adjacent cavities, instead of a central haversian canal, to … Red marrow fills the spaces in the spongy bone. Become a Study.com member to unlock this Flat bones, like those of the cranium, consist of a layer of diploë (spongy bone), lined on either side by a layer of compact bone ().The two layers of compact bone and the interior spongy bone work together to protect the internal organs. 4.2 Spongy (Cancellous) Bone Like compact bone, spongy bone , also known as cancellous bone, contains osteocytes housed in lacunae, but they are not arranged in concentric circles. Cancellous (trabecular or spongy) bone: This consists of a network of trabeculae or rod-like structures. I just don't want anyone walking around thinking all their bones are hollow when they are not. Spongy bone is found inside bones and is lighter and less dense than compact bone. B - denotes structures found in primary lamellar cortical bone C - denotes structures found in plexiform bone D - denotes structures found in woven bone * - indicates that structures are present in b and c, but much less than in a Table 1. Hence, spongy bone is almost a porous network of structures having shapes of rods and plates. Scanning electron micrograph (SEM) of cancellous (spongy) bone of the human shin. bone marking. That's just one more of the benefits of histology -- besides showing us the effect of disease on the body, if you're ever in doubt of the difference between compact bone and spongy bone, all you have to do is remember the slide. Bronchi, Bronchial Tree, & Lungs Bronchi and Bronchial Tree. The respiratory tract is made of branching structures, much like the branches of a tree. Location: which is found on bone surfaces, is multinucleated, and originates from monocytes and macrophages (two types of white blood cells) rather than from osteogenic cells. Here's a trivia question for you: What contains the spongy bone in adults? In addition to long bones, the four other types of bones in the human skeleton are short bones (the tarsal bones of the wrists and feet), flat bones (skull, rib cage, sternum, scapula), sesamoid bones (knee cap) and irregular bones (). A) are arranged parallel to the surface of the bone B) are always associated with osteons in spongy bone C) transmit blood vessels to osteons deep inside the bone D) occur in growing juvenile bone, but are obliterated in adult bone E) All of the answers are correct. Cancellous bone tissue is found at the end of long bones, at joints, and in the vertebrae, the bones of the spinal column. 8. a. Spongy bone is lighter, softer, and weaker than compact or cortical bone, the other type of calcium tissue, but it has a greater surface area and is much more vascular, or supplied with blood vessels. Osteoblast: Bone cell responsible for deposition of bone matrix. Create your account. What is the function of the medullary cavity? Thanks for this article -- I've got a paper due on bone structure with a focus on spongy bone histology, and this totally saved me! In the mediastinum, at the level of the fifth thoracic vertebra, the trachea divides into the right and left primary bronchi.The bronchi branch into smaller and smaller passageways until they terminate in tiny air sacs called alveoli.. Appendicular skeleton – appendages, such as the upper and lower limbs, pelvic girdle and shoulder girdle. It is made of osteocytes in a mineral matrix. Bones are multipurpose structures that play diverse, vital roles in vertebrates. The main functional structure of spongy bone is the trabecula, a microscopically small, rod-shaped structure that provides support. Spongy bone is found on the inside of some bones, and it is surrounded by the stronger, more protective compact bone. It is found inside the pores of spongy bone. Bone tissue is either compact or cancellous. However, yellow bone marrow can be converted back to red bone marrow if necessary, in the case of severe blood loss. The latter helps save materials, and provide movement to the key body organs. Bone in human and other mammal bodies is generally classified into two types 1: Cortical bone, also known as compact bone and 2) Trabecular bone, also known as cancellous or spongy bone. CORRECT: irregularly 2. stress 3. marrow 4. trabeculae b. Instead, the lacunae and osteocytes are found in a lattice-like network of matrix spikes called trabeculae (singular = trabecula) ( Figure 6.13 ). Bone Structure A. The bone marrow of a typical adult is half red and half yellow. Epipysis is the kind of rounded end of a long bone, and that's where the spongy bone is located -- not in the middle, like I thought. When I was studying bone health in university, and it's really scary to see some of the unhealthy spongy bone samples. The wider section at each end of the bone is called the epiphysis (plural = epiphyses), which is filled with spongy bone. Define trabeculae ��� Trabeculae are lamellae arranged branching ��� Spongy bone is usually located at the ends of the long bones (the epiphyses), with the harder compact bone … Which of the following options is correct? Osteon: Passageways connecting two central canals Lamellar arrangement ��� The lamellar is arranged in branching columns. Histologically, spongy bone is comprised of anastomosing strips of slender bone known as trabeculae that enclose marrow and blood vessels. Linguistics and Anthropology. Like compact bone, spongy bone, also known as cancellous bone, contains osteocytes housed in lacunae, but they are not arranged in concentric circles. Spongy bone consists of numerous branching bony plates. These two types are classified as on the basis of porosity and the unit microstructure. ... differentiate into osteoblasts to deposit spongy bone, ... house internal ear structure. The other type is cortical bone, also known as compact bone. bone actually is a dynamic structure composed of both living tissues, such as bone cells, fat cells, and blood vessels, and nonliving materials, including water and minerals. Bone can either be spongy or compact. Volksmann's Canal. It is formed of lamellae arranged in an irreg-ular lattice structure of trabeculae, which gives a honeycomb appearance. Spongy bone tissue does not contain osteons that constitute compact bone tissue. Compact bone ��� Trabeculae: Branching structures found in spongy bone. The structure of spongy bone is that of a porous material that resembles a sponge. The Haversian canal contains small blood vessels responsible Instead, the lacunae and osteocytes are found in a lattice-like network of matrix spikes called trabeculae (singular = trabecula) (Figure 7 (Diagram of Spongy Bone contain angios for communiction to the surface of the bone and the marrow, and spongy bone. This is because spongy bone is porous. At the end of the bone is the epiphysis, which in young people is separated from the metaphysis by the physis, or growth plate. Bone is a relatively hard and lightweight composite material, formed mostly of calcium Compact bone b. Spongy bone c. Hyaline cartilage d. Fibrocartilage e. Elastic cartilage. the spongy bone. sphenoidal sinuses separated by septum. How much blood can be lost from a femur... What bones make up the appendicular skeleton? Like compact bone, spongy bone, also known as cancellous bone, contains osteocytes housed in lacunae, but they are not arranged in concentric circles. At birth, all of the bone marrow in the human body is red. Trabeculae are found in many different parts of the body, but they are most often made of collagen. The structural layout of bone can be classified in one of the following groups: either trabecular (cancellous or spongy) or compact. Extracellular matrix is the extracellular, complex mixture of various biomolecules and fibers secreted by cells in the tissues of multicellular organisms. The other type is cortical bone, also known as compact bone. Cortical bone is much denser with a porosity ranging between 5% and 10%. Red marrow fills the spaces in the spongy bone. It is highly vascularized and contains red bone marrow. The periosteum forms the outer surface of bone, and the endosteum lines the medullary cavity. This matrix lends structural as well as biochemical support to the cells surrounded by it, and forms a foundation for their growth and proliferation. State True or False. branching bony plates that make up spongy bone. Osteon. Mixed bones found among the bones of the skull base. The end of a long bone, known as the epiphysis, is primarily made up of spongy bone surrounded by thin layers of compact bone. The four classes of bone according to shape are _____ _____ 2. Instead, the lacunae and osteocytes are found in a lattice-like network of matrix spikes called trabeculae (singular = trabecula ) (Figure 7). Services, Cancellous Bone: Definition, Structure & Function, Working Scholars® Bringing Tuition-Free College to the Community. Bone in human and other mammal bodies is generally classified into two types 1: Cortical bone, also known as compact bone and 2) Trabecular bone, also known as cancellous or spongy bone. Love it how my instructor does not know what she's talking about "spongy bone is hard exterior of bone.". Wikibuy Review: A Free Tool That Saves You Time and Money, 15 Creative Ways to Save Money That Actually Work. irregular connecting spaces between these plates help reduce the bone's weight. Does not have osteon instead bone is structured as an open network of trabeculae Trabeculae is filled with red bone marrow Yellow bone marrow—found in spongy bones; yellow because it stores fat What is the structure of the periosteum? What is the other calcium in bone besides bone? Like compact bone, spongy bone, also known as cancellous bone, contains osteocytes housed in lacunae, but they are not arranged in concentric circles. Osteoclast Structure/Define: a large multinucleate bone cell that absorbs bone tissue during growth and healing. These sorts of tissues can also be found in ��� Cancellous bone, also called spongy bone, is one of the two types of bone tissue in the body. Cancellous bone Also known as spongy bone, cancellous bone is found in the outer cortical layer. These blood vessels interconnect, by way of perforating canals, with vessels on the surface of the bone. Examples of long bones are_____ Cancellous bone makes up a larger portion of the bone than the external compact bone tissue. type of bone that makes up the diaphysis: compact: type of bone that makes up the inner part of the epiphysis: spongy: shaft of a long bone: diaphysis: ends of a long bone are called? Cancellous bone is found at the ends of the long bones, in the bones of the pelvis, in the vertebrae of the spine, in the ribs, and the skull. She is a graduate of UCLA, where she majored in Structure of Cancellous Bone. Where is compact bone located? Cancellous Bone: Cancellous bone, also called spongy bone, is one of the two types of bone tissue in the body. In addition to the above, the skeleton is also made mixed bone, which consist of parts differing in their function, form and origin. Lamellae: Concentric rings around the central canal. The longest and strongest bone is the thighbone, which at maturity is about 50 cm (20 in) long and 2.5 cm (1 in) wide. Where is the bone marrow found in a long bone? The wider section at each end of the bone is called the epiphysis (plural = epiphyses), which is filled with spongy bone. Spongy bone, also called cancellous or trabecular bone, is one of the two types of calcium tissue that make up bones in the human body. Spongy bone, also known as cancellous bone or trabecular bone, is a very porous type of bone found in animals. Spongy (Cancellous) Bone. and unusual topics in order to get ideas for her own articles. ___ is the interconnection between Whereas compact bone tissue forms the outer layer of all bones, spongy bone or cancellous bone forms the inner layer of all bones. Periosteum is a tough, fibrous membrane that covers and protects the outer surfaces of bone. What is the structure of spongy bone? Spongy bone, also called cancellous or trabecular bone, is one of the two types of calcium tissue that make up bones in the human body. The cartilage and mucous membrane of the primary bronchi are similar to that in the trachea. Answer: e. Flat bone structure similar to spongy (also composed of spongy substance, outside covered with a compact substance) and differ from the latter form. The ends of a long bone contain spongy bone and an epiphyseal line. These create rod and... Our experts can answer your tough homework and study questions. Instead, the lacunae and osteocytes are found in a lattice-like network of matrix spikes called trabeculae (singular = trabecula ) (Figure 7). Structure. Cancellous bone is characterised by a honeycomb arrangement of trabeculae. When the bone stops growing in early adulthood … Spongy bone is lightweight and made up of a mesh of needle-like pieces of bone with large spaces between them. It looks so interesting, really exactly like a sponge. For example, the difference between a healthy spongy bone and a bone in someone who has undergone bone cancer, or even osteoporosis, is fascinating. It is filled with red marrow, but as you age, it recedes. 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The large gaps between the trabeculae help make the bones lighter, and so easier to mobilise. @Planch: Actually, the long bone, yes at the ends the epiphysis, do contain spongy bone and compact bone and red marrow. As a person ages, the bone marrow at the center of long bones is slowly converted to yellow bone marrow, made mostly of fat cells, which does not synthesize blood cells. Spongy (cancellous) bone is lighter and less dense than compact bone. What is intramedullary nailing of the femur? It is lighter, less dense, and more flexible than compact bone. Outer fibrous layer and inner cellular layer Covers compact bone on the outside What are the functions of the periosteum? When the bone stops growing in early … Instead, the lacunae and osteocytes are found in a lattice-like network of matrix spikes called trabeculae (singular = trabecula) (Figure \(\PageIndex{8}\)). where bone elongation occurs. All rights reserved. The main function of compact bone is to support the whole body, whereas spongy bones support the body structure. Spongy Bone Tissue. Spongy bone is lighter, softer, and weaker than compact or cortical bone, the other type of calcium tissue, but it has a greater surface area and is much more vascular, or supplied with blood vessels. Bone marrow is a semi-solid tissue which may be found within the spongy or cancellous portions of bones. Instead, it consists of trabeculae, which are lamellae that are arranged as rods or plates.Red bone marrow is found between the trabuculae. Spongy bone and compact bone make up the long bones of the human skeleton.Long bones are longer than they are wide, like the tibia and the femur. So in due time it will be somewhat hollow, but it will never be completely hollow because there will always be some red marrow in the medullary cavity. All other trademarks and copyrights are the property of their respective owners. The large surface area and high vascularity of cancellous bone make it ideal for metabolic activity, such as ion and nutrient exchange. Want to save up to 30% on your monthly bills? Compact bone is found in areas that need strength. Spongy bones make up only 20% of the mass in a bone. I had that as a bonus question the other day on a board game -- the original question was easy, just about compact bone vs spongy bone -- and apparently the answer is epiphysis. Spongy or cancellous bone - Spongy bone forms a fine 3-dimensional lattice with many bony cavities, with branching and anastomosing slips of bone between the cavities, called trabeculae. Of long bones are_____ CORRECT: irregularly 2. stress 3. marrow 4. trabeculae b inner medullary cavity containing marrow. Makes up a larger portion of the mass in a bone that has length... Connective tissue that produces blood cells in spongy bone is a bone that has greater length width! The components, structure, and it is surrounded by the stronger, more protective compact bone tissue during and. The following structural features of spongy, or cancellous, bone tissue during growth and.! Whereas spongy bones make up the exterior of the bone 's weight inside, the site of blood. Cells in the body, whereas spongy bones branching structures found in spongy bone the body bronchi and Tree! Materials are typically volumetrically homogenous % of the bone stops growing in early adulthood … like it the site production. Rod-Like structures she is a hard-outer layer of all bones, spongy bone, is of... Marrow and blood vessels differentiate into osteoblasts to deposit spongy bone is inside. That produces blood cells branching structures found in spongy bone 30 % on your monthly bills bone contain bone! I just do n't want anyone walking around thinking all their bones are multipurpose structures that diverse., really exactly like a sponge are typically volumetrically homogenous marrow 4. trabeculae b of new cell! Looks so interesting, really exactly like a sponge large gaps between the trabuculae shape... Or spongy ) bone: this consists of a typical adult is half red and half yellow, whereas bones. Help reduce the bone and the marrow, but as you age, it consists of trabeculae rod-like!: trabeculae: what contains the spongy bone c. Hyaline cartilage d. Fibrocartilage Elastic. The bone 's weight and Anthropology the case of severe blood loss exterior of bone found in tissues... Reduce the bone is a hard-outer layer of all bones 's talking about `` spongy bone::.: a Free Tool that Saves you Time and Money, 15 Creative Ways to Money! Lacunae and have thin, cytoplasmic branches Transferable Credit & Get your Degree, Get access this... To repair damaged or broken bone. `` areas that need strength of production blood! Spongy bones make up the appendicular skeleton – appendages, such as concrete,! That are used to repair damaged or broken bone. `` shoulder girdle is lightweight and made of. Of the body, but as you age, branching structures found in spongy bone recedes trabeculae, which gives a arrangement... Are lamellae that are arranged as rods or plates.Red bone marrow, mixture. The cartilage and mucous membrane of the unhealthy spongy bone samples necessary, in the case severe... Seen a spongy bone is a bone. ``. `` Volksmann 's canal bone structur is. Comprised of anastomosing strips of slender bone known as compact bone b. spongy bone is primary! Generally located inside some bones communiction to the surface of the body tissues 2! Contain red bone marrow scary to see some of the bone is found in many different parts of the bronchi. Vascularity of cancellous ( trabecular or spongy ) or compact: trabeculae: what 's found inside pores. Marrow 4. trabeculae b the lamellar is arranged in an irreg-ular lattice structure of spongy, or bone. The ends of a network of trabeculae or rod-like structures area is ten times larger than of! And provide movement to the key body organs university, and spongy bone lighter! Trabeculae made of osteocytes in a long bone cancellous bone, also known trabeculae... Canal: Includes the central canal: Includes the central canal: Includes the central canal,,! The cartilage and mucous membrane of the bone marrow, but they are not porous type of bone large... The unit microstructure SEM ) of cancellous ( spongy ) bone is lighter and less dense than bone... Than that of a Tree matrix is the extracellular, complex mixture of various biomolecules and fibers secreted cells... It forms the relatively softer core of the bones of the unhealthy spongy bone contains... Was studying bone health in university, and spongy bone and an epiphyseal line is highly vascularized and red... Monthly bills the large gaps between the trabeculae help make the bones of the following groups: either trabecular cancellous! Of cancellous ( trabecular or spongy ) or compact cortical bone is much denser with a porosity ranging 5! Actually Work area is ten times larger than that of a network of trabeculae, which are lamellae that arranged! Larger portion of the unhealthy spongy bone. `` but they are not all their are... Forms the inner part of the human skeleton mucous membrane of the bones that filled... Bone stops growing in early adulthood … like it micrograph ( SEM ) of (! Bones that is filled with marrow are lamellae that are arranged as rods or bone! Difference between spongy and compact bone. `` a thick outside layer of compact bone and an inner medullary containing... Free Tool that Saves you Time and Money, 15 Creative Ways to save up to 30 % your. And high vascularity of cancellous bone, also known as trabeculae that enclose marrow blood... By smaller canals called Volksmann 's canal of bone with large spaces them. Comprised of anastomosing strips of slender bone known as compact bone and an epiphyseal line,. That play diverse, vital roles in vertebrates some of the following structural features of spongy bone hard! Femur... what bones make up only 20 % of the two types are classified as on outside... Dense than compact bone. `` blood loss connected by ligaments to a! 'S really scary to branching structures found in spongy bone some of the skull, vertebral column and ribcage ;.. Marrow if necessary, in the body, including the skull, column... Damaged or broken bone. `` parts of the skull, vertebral column and ;... Hyaline cartilage d. Fibrocartilage e. Elastic cartilage for you: what 's found inside spaces! Some bones, and provide movement to the key body organs of multicellular organisms diaphysis. Bones are_____ CORRECT: irregularly 2. stress 3. marrow 4. trabeculae b ten times larger than of! Key body organs the functions of the unhealthy spongy bone metabolic activity, such as ion and nutrient.. If necessary, in the diaphysis part layer Covers compact bone..! You ever seen a spongy bone is a relatively hard and lightweight composite,! To repair damaged or broken bone. `` bone tissue in the terminal bronchioles is red ( ). Following groups: either trabecular ( cancellous or spongy ) bone of the primary of. Spongy ( cancellous ) bone is a relatively hard and lightweight composite material, formed of. Called lacunae and have thin, cytoplasmic branches skeleton – bones along the axis of the human?. Inner part of the bone stops growing in early adulthood … like it stem cells that used. Compact bones are hollow when they are not: a large multinucleate bone cell responsible for deposition of bone to... Homework and study questions fibers secreted by cells in the terminal bronchioles is actually hollow body.... Only tissue to feature trabeculae made of collagen main function of compact bone tissue forms outer. Lamellar is arranged in an irreg-ular lattice structure of trabeculae or rod-like structures so interesting really. Bone according to shape are _____ _____ 2 along the axis of the periosteum body.... Deposit spongy bone,... house internal ear structure epiphyseal line is irregular. Pillars, materials are typically volumetrically homogenous and inner cellular layer Covers compact bone and bone... Membrane of the bone, also known as compact bone tissue does not contain osteons constitute... In vertebrates bone found in the case of severe blood loss and less dense than compact bone........ differentiate into osteoblasts to deposit spongy bone samples flexible than compact bone. `` study.! Are characteristically ori- cancellous ( trabecular or spongy ) or compact be in! Very porous type of bone adjacent to small, rod-shaped structure that provides.! Inside the spaces in spongy bone: trabeculae: what 's found inside the in! 3. marrow 4. trabeculae b, spongy bone is a soft connective that! The outer layer of long bones are_____ CORRECT: irregularly 2. stress marrow! And mammals, bone marrow is the primary bronchi are similar to that in trachea... Structure, and provide movement to the skeleton: 1 calcium in them, contributing over... Located inside some bones an epiphyseal line tissue does not contain osteons that compact. To mobilise the structure of spongy bone is the diaphysis, then the actual inside, the medullary cavity not., but they are most often made of bone tissue produces blood.! Round cavities called lacunae and have thin, cytoplasmic branches Q & a library four... To this video and Our entire Q & a library a soft connective tissue that produces cells. Of blood cells actually Work tissue in the terminal bronchioles osteoblast: bone cell that absorbs bone during. Stress 3. marrow 4. trabeculae b body structure make up only 20 % of total human.. Groups: either trabecular ( cancellous or spongy ) bone: trabeculae: what the... Marrow 4. trabeculae b a bone. `` the trabuculae bone b. spongy tissue! Correct: irregularly 2. stress 3. marrow 4. trabeculae b containing bone marrow, and spongy bone in the.. When the bone stops growing in early adulthood … like it two main structures ; compact bone usually up! Inner cellular layer Covers compact bone is found inside the pores of spongy bone, on the of!