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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 60,000 miles of blood vessels in every adult human.
Did you know?
Approximately 500,000 babies are born each year in the United States to teenage mothers.
Did you know?
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.