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Did you know?
The human body produces and destroys 15 million blood cells every second.
Did you know?
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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.