Quiz: How well do you know the bare bones?

Vitamin D helps absorb calcium. Without Vitamin D, the hormone calcitriol cannot be produced adequately. Since not enough calcium is absorbed from food, the body draws on calcium reserves in the bones, weakening them.

The stapes is the smallest bone in the human body located in the middle ear. It aids the transmission of sound vibrations to the inner ear.

The malleus is a hammer-shaped bone, one of the three bones in the middle ear.

The femur (thigh bone) is the longest and strongest bone in the body.

The pelvis refers to a basin-shaped set of bones that supports the spine and protects the organs in the abdomen.