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Cancellous bone, additionally called trabecular bone or spongy bone, light, porous bone enclosing numerous big spaces that offer a honeycombed or spongy appearance. The bone matrix, or framework, is organized right into a three-dimensional latticework that bony processes, dubbed trabeculae, arranged follow me lines that stress. The spaces in between are frequently filled v marrow and blood vessels.
Cancellous bone renders up around 20 percent the the person skeleton, offering structural support and flexibility without the weight of compact bone. The is uncovered in most locations of bone that space not subject to good mechanical stress. It provides up lot of the enlarged end (epiphyses) the the lengthy bones and is the major component that the ribs, the shoulder blades, the flat bones the the skull, and a variety of short, level bones elsewhere in the skeleton. Cancellous bone is typically surrounded through a shell of compact bone, which gives greater strength and rigidity. The open structure the cancellous bone permits it to dampen suddenly stresses, together in pack transmission through the joints. Differing proportions of room to bone are discovered in different bones according to the need for stamin or flexibility. Cancellous bone likewise has a reasonably high level the metabolic activity.
Cancellous bone can develop into compact bone v the activity of bone-forming cells called osteoblasts. The is in that manner that all long bones develop in the embryo. The osteoblasts deposit new bone matrix in layers approximately the trabeculae, which thus enlarge in ~ the cost of the spaces in between them. Eventually the spaces room eliminated, and immature compact bone is produced. See also bone formation.
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