Mostly calcium
The human body is made up of about 15 percent bone.
bone
in the bone marrow
udu hk
In Kenya, of course! :D
Whale, human, animal.
The diaphragm is not made out of bone, but the diaphragm is a muscle.
human are made of flesh and bone not mud and sand
muscles, bone, blood, nerves, etc
they are made of bone? o.O
A single, long bone would be rigid, to make a spine that will bend it has to be made of smaller articulated units.
A shark's "skeleton" is made of cartilage while human skeleton is made of bone.