|
|
Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
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.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
![Shortly after his death, George Washington had already become myth—part Moses, part angel—in this wo](https://biology-forums.com/gallery/47/medium_374628_16_08_15_9_52_07_22255346.jpeg)
![Which do you think is most at work in a debate contest, mastery- or performance-goal orientations or ...](https://biology-forums.com/gallery/47/medium_667187_21_02_17_9_06_07_256952303.png)