It is made up of spongy cancellous bone with a shell of compact bone.
The clavicle is made from sponge-like bone, called cancellous bone, and is covered with a hard shell of bone.
The clavicle is made from sponge-like bone, called cancellous bone, and is covered with a hard shell of bone.
让这段文字不那么复杂: It is made up of spongy cancellous bone with a shell of compact bone. 输出: