|
|
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Your heart beats over 36 million times a year.
Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.
According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.
![The tiger, Panthera tigris, was historically found throughout much of Asia, but at low population de](https://biology-forums.com/gallery/47/medium_33_22_09_11_9_37_27_18051031.jpeg)
![The first commercially successful typewriter, manufactured in quantity beginning in 1874, surely fue](https://biology-forums.com/gallery/47/medium_376716_26_08_15_11_14_05_224411209.jpeg)