|
|
More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.
Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
There are more nerve cells in one human brain than there are stars in the Milky Way.
Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
![Luna Park at Coney Island was a vast living theater in which strollers were both spectators and acto](https://biology-forums.com/gallery/47/medium_6_24_08_15_12_36_54_224251401.jpeg)
![Many gasoline service stations have signs posted warning customers to place plastic fuel containers ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_1_36_26_293801874.png)