There are 206 bones in the human body, which are divided into three parts: skull, trunk and limbs. There are 29 skulls, 5 1 trunk bones and 0 126 limbs bones.

2. Bone: Hard tissue in or on the body surface of human body or animal. There are two kinds: the bones of human and higher animals are in the body and consist of many bones, which are called endoskeleton; The hard shell of arthropods and mollusks and the scales and armor on the body surface of some vertebrates (such as fish and turtles) are called exoskeletons. Skeleton usually refers to endoskeleton.

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