Ask unlimited questions for free
The human body produces and destroys 15 million blood cells every second.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
The average office desk has 400 times more bacteria on it than a toilet.
For a complete list of videos, visit our video library
