Ask unlimited questions for free
The human body produces and destroys 15 million blood cells every second.
There are 20 feet of blood vessels in each square inch of human skin.
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Blood is approximately twice as thick as water because of the cells and other components found in it.
The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
For a complete list of videos, visit our video library