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Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
Thyroid conditions may make getting pregnant impossible.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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?
More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.