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Did you know?
Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Did you know?
Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
Did you know?
Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.
![If the needle drops 1 or 2 inches Hg from the normal reading, one of the engine valves is burned or ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_4_21_49_29689762.png)
![Skin testing. Note the spot labeled H, which is the positive histamine control, and the spot labeled ...](https://biology-forums.com/gallery/31/medium_398119_12_07_17_5_16_13_316372001.jpeg)