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Did you know?
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
Did you know?
Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
Did you know?
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.