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 reaches maximum density around age 21. In adults, it occurs mainly in the pelvis, cranium, vertebrae, and sternum.
The human skeleton of an adult consists of around 206 to 208 bones, depending on the counting of the sternum It is composed of 270 bones at birth, but later.
While the adult human skeletal system includes 206 bones, the infantile skeletal system has many more, since not all of the bones have fused together yet.