Printable Human Skeleton Diagram Pdf Worksheet
The human skeleton is the internal framework of the human body. It is composed of around 270 bones at birth this total decreases to around 206 bones by adulthood after some bones get fused together. The bone mass in the skeleton makes up about 14% of the total body weight (ca. 10–11 kg for an average person) and reaches maximum density around age 21.
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