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Did you know?
Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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In 1864, the first barbiturate (barbituric acid) was synthesized.