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Name the tissue that smoothens bones surface at joints. Describe its structure with the help of diagram.  

Answer:

Cartilage is the tissue that smoothens bone surfaces at joints.                                            (1) Structure of Cardiac Tissue It is a specialised connective tissue which is compact and less vascular. Its extensive matrix is composed of proteins and slightly hardened by calcium salts and also has delicate network of collagen fibres and living cells, chondrocytes. The chondrocytes are present in lecunae. It provide support and flexibility to body parts and also smoothens bone surface at joints. Cartilage it also present in nose, trachea, ear and larynx.                                                        (2)