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Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
The longest a person has survived after a heart transplant is 24 years.
Did you know?
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.