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Did you know?
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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?
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.