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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.