The instructor will provide you with a plastic model of enlarged bone tissue. Label the structural components of bone tissue in the diagram: Canaliculus Compact bone Haversian canal Lacuna Lamellae Osteocyte Osteon II Spongy bone Check Answer Get more help from Chegg Get 1:1 help now from expert Anatomy and Physiology tutors Bones are important components in assisting movement and granting a shape to the body. Spongy bone can be converted to compact bone by the action of osteoblasts, bone cells that secrete the material that creates the compact bone matrix. Compact bone appears solid and spongy bone consists of a web- or sponge-like arrangement of solidified extracelluar matrix. While compact bone appears at first glance to be solid and uninterrupted, closer inspections reveals that the osseous tissue only makes up … The cortical bone gives bone its smooth, white, and solid appearance, and accounts for 80% of the total bone mass of an adult human … Cancellous bone also provides strength, but due to its structure, it has a much lower mass than compact bone. Fibrous outer layer 2. At the outer edges of compact bone, rather than being arranged in osteons, the osseous tissue is arranged in circumferential lamellae. Usually found in long bones of the body, it consists of units called osteons, each of which is called a haversian system with a series of canals, concentric rings, and bone cells called osteocytes. Components of compact bone located between osteons, which are incomplete and lack a central canal, are called interstitial lamellae. These blood vessels interconnect, by way of perforating canals, with vessels on the surface of the bone. I. In fact, these bones cover a large area inside the bone. A long bone has a shaft and 2 ends. There is a different layer of connective tissue proper that lines all the internal cavities of bones – the central canals of osteons in compact bone, and the exterior surface of trabeculae in spongy bone – called the endosteum. At the center of each osteon is a central canal (also known as a Haversian canal) through which blood vessels, lymph vessels, and nerves can travel to service and signal the cells throughout the compact bone. Except at its edge, the osseous tissue of compact bone is arranged in cylindrical osteons. It forms the hard exterior (cortex) of bones. Cytoplasmic extensions branch out from each osteocyte and are housed in the canaliculi, the thin empty channels that again prevent the solid, mineralized extracellular material from crushing the osteocyte extensions. The vessels and nerves of spongy bone travel through the spaces between trabeculae and do not need separate passageways. Differentiate between compact and spongy bone. Its two principle components are collagen and calcium phosphate. Isolates bone from surrounding tissues 2. Furthermore, both are structural bones. Special equipment is often used because bone is much harder than other tissues. Turnover and degradation of normal and pathological matrices are dependent on the responses The bones of the body only have compact bone on their outermost surfaces and never very deep. Compact bone, also called cortical bone, dense bone in which the bony matrix is solidly filled with organic ground substance and inorganic salts, leaving only tiny spaces (lacunae) that contain the osteocytes, or bone cells. Each osteon is a compact cylinder of concentric lamellae. With the exception of the kneecap, wrist, and ankle bones, all the bones of the limbs are long bones. Now, within that extracellular matrix, or within the concentric lamellae Within a single trabecular, there are concentric lamellae, with osteocytes in lacunae connected to one another via canaliculi, similar to the tissue arrangement in the osteons of compact bone. Compact bone is formed in concentric circles. The University of Cambridge indicates that there are two types of bone in the human body: cortical, or compact, bone and cancellous bone, which is also known as lacunae. Compact bone is sometimes called cortical bone. Compact bone is the harder outer shell of the bone while cancellous bone is the inner porous, less dense layers of the bone. In spongy bone there far more uncompacted space. Under magnification you can clearly see the system of concentric circles that forms compact bone. Both are skeletal bones. The osteons run parallel to the long axis of a bone. The central region of compact bone consist of osteons. Identify the internal structural components of spongy and compact bone. Compact bone that forms the shafts of long bone consists of two structures. These cells travel around the bone to areas in need of resorption. So, you'll have not only the nerve, artery, and vein, you'll also have lymphatics that are going to drain areas in terms of the bone, drain length from the bone. Only compact bones have osteons as a basic structural unit; spongy bones don’t have osteons. In spongy bone the osseous tissue is arranged into trabeculae, which are the interconnected columns of osseous tissue which create the sponge-like grid of spongy bone. The osteonic canals contain blood vessels that are parallel to the long axis of the bone. Wikibuy Review: A Free Tool That Saves You Time and Money, 15 Creative Ways to Save Money That Actually Work. It makes up around 80 percent of adult bone mass. canals that connect the central canls to osteocytes (mature cell) gives blood supply to osteocytes. 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