Ask unlimited questions for free
Approximately 500,000 babies are born each year in the United States to teenage mothers.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
The familiar sounds of your heart are made by the heart's valves as they open and close.
For a complete list of videos, visit our video library