Facts on Human Body Anatomy

A. Every hour one billion cells in the body daam must be replaced. 2. The human eye can distinguish 500 shades of gray. 3. Human thigh bones are stronger than concrete. 4. The human heart can create enough pressure to squirt blood as far as 30 feet (9 m). 5. Our eyes are always the same size from birth, but our nose and ears never stop growing. 6. The average cough comes out of our