|
|
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
If you could remove all of your skin, it would weigh up to 5 pounds.
Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
There are more bacteria in your mouth than there are people in the world.
![Remove cold source, and check the knee for changes. Notice skin color and changes in swelling around ...](https://biology-forums.com/gallery/33/medium_380798_23_08_17_6_33_39_332881596.jpeg)
![The U.S. military uses its own marking system to identify explosive hazards (left), chemical hazards ...](https://biology-forums.com/gallery/33/medium_380798_24_08_17_3_22_01_33649938.jpeg)