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Cancellous bone, also called trabecular bone or spongy bone, light, porous bone enclosing numerous huge spaces that provide a honeycombed or spongy appearance. The bone matrix, or framework, is organized into a three-dimensional latticework that bony processes, referred to as trabeculae, arranged along lines that stress. The spaces in between are regularly filled with marrow and blood vessels.
Cancellous bone makes up around 20 percent that the person skeleton, providing structural support and flexibility without the weight of compact bone. It is discovered in most areas of bone that are not subject to great mechanical stress. It provides up lot of the enlarged end (epiphyses) that the lengthy bones and is the major component that the ribs, the shoulder blades, the flat bones the the skull, and a selection of short, level bones elsewhere in the skeleton. Cancellous bone is generally surrounded by a shell of compact bone, which gives greater strength and rigidity. The open structure that cancellous bone allows it come dampen sudden stresses, together in pack transmission with the joints. Varying proportions of room to bone are uncovered in various bones follow to the require for toughness or flexibility. Cancellous bone also has a fairly high level the metabolic activity.
Cancellous bone can build into compact bone v the activity of bone-forming cells dubbed osteoblasts. That is in that manner the all lengthy bones develop in the embryo. The osteoblasts deposit new bone procession in layers approximately the trabeculae, which for this reason enlarge in ~ the cost of the spaces in between them. Eventually the spaces are eliminated, and also immature compact bone is produced. See also bone formation.
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