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Your heart beats over 36 million times a year.
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.
Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
![Cradle the head briefly in both hands to end this section. Hold for a few seconds until you can feel ...](https://biology-forums.com/gallery/33/medium_380798_23_08_17_1_47_42_33124348.jpeg)
![Knead the calf muscles with both hands. Place the foot flat on the table, knee bent. Reach behind ...](https://biology-forums.com/gallery/33/medium_380798_23_08_17_7_05_48_333092325.jpeg)