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Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
Did you know?
When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
Did you know?
Everyone has one nostril that is larger than the other.
Did you know?
It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.