The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
Did you know?
Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.
Did you know?
Medication errors are three times higher among children and infants than with adults.
Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
False killer whales
A true albino squirrel. Note the pink eyes.
TrUe....FaLsE
False-color imagery of the Sun, a G-type main-sequence star, the closest to Earth.