Describe the structure of cartilage and bone
Answers
Explanation:
Bone : Bone is a solid, hard porous tissue. It is produced by osteocyte cells. It forms the natural skeleton and gives the body its basic structure and also supports the body. Its matrix is impregnated with phosphates and carbonates of calcium and magnesium which provides hardness to it. The matrix also contains ossein protein. The matrix is arranged in concentric rings which are called lamellae.
Bone cells lie between the lamellae in fluid-filled spaces called lacunae. Bone cells are also called osteocytes.
The bone is surrounded by a connective tissue called periosteum by which muscles and tendons are attached to the bone. A long bone has a hollow cavity filled with bone marrow which is richly supplied with blood vessels. Cartilage : Cartilage has widely spaced cells. It is a solid but semi-rigid connective tissue. The solid matrix is composed of proteins and sugars. The cartilage cells are large and angular and they are called chondriocytes. They occur in clusters of 2 or 3 cells in the small spaces called lacunae scattered in the matrix. A sheath called perichondrium binds the cartilage.