BIOLOGY-(quick answers needed) explain bone is a dynamic tissue ?

[madhavi]

after the osteoclast cells destroy the bony matrix what happens to it ?? how are the distroyed cells removed completely frm the body ?

pls mention the reference used.

i need quick answers before my exam on 24th.

[steven19_xix]

how are the distroyed cells removed completely frm the body ? -i have the answer for this one.
but i have no reference rather than my mind.

anyways..
do you even wonder why your toe/fingernails keeps on growing?
or why does your hair keeps growing longer and longer each day?
well..yes! its how our body take out the dead cells.

very simple isn't it? yet no one wondered.

hope that helped

[siwedlarm]

Bone is a dynamic tissue as it is very much alive. Osteoclasts remove calcium from bones allowing for the shaping of the tissue in conjunction with osteoblast activity, which deposits calcium into the bones. Both often function at the same time. The cells aren't really destroyed by the osteoclasts. Osteoclasts remove bone matrix. Calcium removed by osteoclasts is recycled or passed in urine. Osteoclast activity is stimulated by low calcium levels in the blood while osteoblast activity is stimulated by high calcium. Hence, the bone, like adipose tissue for fats, is the body's storage center for calcium.