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Osteoarthritis is a joint disease that mostly affects cartilage. Cartilage is the slippery tissue that covers the ends of bones in a joint. Healthy cartilage allows bones to glide over each other. It also helps absorb shock of movement.
Bone and cartilage are types of connective tissues in the body. A bone is hard tissue that forms the skeletal structure of the body. Cartilage, by comparison, is not as hard and rigid as bone, and is present in areas of the body like the ear, nose, and joints.In the joints of the body, cartilage covers the ends of the bones and acts as a shock absorber to prevent bones from rubbing against each other.artilage essentially consists of chondrocyte cells which produce an extracellular matrix consisting of collagen fibres, proteoglycan, and elastin fibres. Different types of cartilage contain these components in different proportions. Cartilage, unlike bones, does not contain blood vessels.