A specialised tissue is present in animals that smoothens the surface of a bone at a joint. With the help of a labelled diagram, explain its structure.
Cartilage is a connective tissue that smoothens the surface of a bone at joints.
Structure It is a specialised connective tissue which is compact and less vascular. Its extensive matrix is composed of proteins and is slightly hardened by calcium salts. It also has delicate network of collagen fibres and living cells called chondrocytes.
The chondrocytes are present in lacunae. The function of cartilage is to provide support and flexibility to body parts and also smoothens bone surface at joints. Cartilage is present in nose, trachea, ear and larynx.
The structure of cartilage can be diagrammatically represented as follows