Class 11 NEET Biology Structural Organisation in Animals

(a) : Bone is an unusual tissue in that it is continually being reconstructed. The osteoblasts secrete bone matrix, whereas the large, much branched, motile, lysosome-rich, multinucleate cells, called osteoclasts, destroy bone matrix. The twin process of resorption and reconstruction enables a particular bone to remodel its structure to meet any change in the mechanical requirements of the animal during its development.