•a covering for the body (or parts of it) consisting of a dense growth of threadlike structures (as on the human head); helps to prevent heat loss

•An organ of vision or of light sensitivity.

•the part of a person's or animal's body connecting the head to the rest of the body.

•the joint between the thigh and the lower leg in humans

• a projecting piece (such as a pawl for a ratchet) brought into contact with an object to affect its motion