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Did you know?
Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
Did you know?
Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.