Ask unlimited questions for free
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
The longest a person has survived after a heart transplant is 24 years.
Your heart beats over 36 million times a year.
The FDA recognizes 118 routes of administration.
For a complete list of videos, visit our video library