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Did you know?
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Did you know?
The longest a person has survived after a heart transplant is 24 years.
Did you know?
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.