Top 20 human anatomy facts Vertebral Discs have no blood supply: they are hydrated and nourished by fluid movement.

Fascia is found everywhere in the body.

Some muscles are attached to the membrane that encloses the lungs.

Some muscles are missing on some people.

If something shortens, then something else lengthens.

Move anything, however small, and the rest of the body adjusts to that.

Calcium in bones is replaced completely about every 10 years.

Red blood cells are made at 2 million per second and last about 120 days.