Describe structure and functions of bone.

Bone is a strong and non-flexible tissue. The cells of bones are called osteocytes. Bone cells are embedded in a hard matrix that is composed of calcium and phosphorus compounds. Each cell is enclosed in a small cavity called the lacuna.

Functions:

(i) It provides shape to the body.

(ii) It forms the framework that supports the body.

(iii) It anchors the muscles.

(iv) It protects the vital body organs like brain, lungs, etc.