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Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Did you know?
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Did you know?
The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
Did you know?
There are more bacteria in your mouth than there are people in the world.
Did you know?
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.