How many bones are in the adult human skeleton?

How many bones are in the adult human skeleton?

• A. 206
• B. 210
• C. 196
• D. 220

Answer: (A)

Adult humans typically have 206 bones in the skeleton, because many bones fuse together as we grow. At birth there are about 270 bones, which decrease to around 206 once growth is complete. The standard breakdown is about 80 bones in the axial skeleton (skull, spine, rib cage, sternum) and 126 in the appendicular skeleton (limbs and girdles), and while a few people may have minor variations such as extra ribs or differently fused bones, 206 is the conventional number for a typical adult.

Adult humans typically have 206 bones in the skeleton, because many bones fuse together as we grow. At birth there are about 270 bones, which decrease to around 206 once growth is complete. The standard breakdown is about 80 bones in the axial skeleton (skull, spine, rib cage, sternum) and 126 in the appendicular skeleton (limbs and girdles), and while a few people may have minor variations such as extra ribs or differently fused bones, 206 is the conventional number for a typical adult.