Bones come in various shapes, sizes and strengths to meet the needs of performing multiple activities. Human infants usually have around 270 bones, which fuse to form 206 to 213 bones in adults. The variation in the number of bones is that different individuals may have different numbers of vertebrae, ribs, and digits.
The human skeleton has six main objectives: support, protection, movement, blood cell formation, mineral storage, and endocrine regulation. Compared to other primate species, the human skeleton is less sexually dimorphic, although there are still subtle changes between the sexes in the shape of the head, teeth, long bones, and pelvis.
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