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The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
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.
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.
Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.
Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.
![A DOHC engine uses a camshaft for the intake valve and a separate camshaft for the exhaust valves in ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_1_02_48_293232417.png)
![A vane phaser is used to move the camshaft using changes of oil pressure from the oil control valve.](https://biology-forums.com/gallery/29/medium_548020_30_05_17_3_43_27_296422479.png)