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The axial skeleton (80 bones) is formed by the vertebral column (32–34 bones; the number of the vertebrae differs from human to human as the lower 2 parts, sacral and coccygeal bone may vary in length), a part of the rib cage (12 pairs of ribs and the sternum), and the skull (22 bones and 7 associated bones).
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The appendicular skeleton, comprising the arms and legs, including the shoulder and pelvic girdles, contains 126 bones, bringing the total for the entire skeleton to 206 bones. Infants are born with about 270 bones [ 4 ] with most of it being cartilage, but will later fuse together and decrease over time to 206 bones.
This image was selected as picture of the day on the English Wikipedia for November 1, 2019. Description Human skull side simplified (bones).svg the adult skull is normally made up of 22 bones.
Anatomical model – Three-dimensional representation of human or animal anatomy; Body image – Aesthetic perception of one's own body; Cell physiology – Study of cell activity; Comparative anatomy – Study of similarities and differences in the anatomy of different species
Sure, this isn't an exact level of detail or choice of terminology I can find anywhere else, but that shouldn't matter. I can find lots of tiny part-of-skeleton diagrams that label everything with the longest name possible and lots of simple diagrams that leave tons of stuff out. This appears to be a good compromise.
The sacrum (pl.: sacra or sacrums [1]), in human anatomy, is a large, triangular bone at the base of the spine that forms by the fusing of the sacral vertebrae (S1–S5) between ages 18 and 30. [2] The sacrum situates at the upper, back part of the pelvic cavity, between the two wings of the pelvis. It forms joints with four other bones.