Friday 22 June 2012

64.CANCELLOUS BONE

A.STRUCTURAL STRENGTH
B.OSTEOGENESIS
C.PROTECTS BONE MARROW
D.

ANS:PROTECTS BONE MARROW


Cancellous bone is the spongy interior layer of bone that protects the bone marrow. Cancellous bone may also be called a spongy bone or trabecular bone. It structurally resembles honeycomb and accounts for about 20% of bone matter in the human body.

Cancellous bone is often also found on the edges of rounded bones like those of the arms and legs. Though this bone is not quite as strong as compact bone, it is somewhat more flexible and is useful in bones that are jointed. Primarily, however, cancellous bone protects the bone marrow, performing a useful and necessary task in the body.

Some conditions can affect the cancellous bone in a person’s body. Those with osteoporosis may have less cancellous bone than is normal. Since much of the cancellous bone is found in bones in the pelvis and spine, lack of cancellous bone is indicated in significant risk.

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