|
|
The familiar sounds of your heart are made by the heart's valves as they open and close.
Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
By definition, when a medication is administered intravenously, its bioavailability is 100%.
Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
![William Masters and Virginia Johnson are among the most influential researchers in the history of th](https://biology-forums.com/gallery/47/medium_558257_07_07_16_12_34_14_236661532.jpeg)
![In countries where water can be contaminated, breastfeeding is an important option for the health of ...](https://biology-forums.com/gallery/47/medium_637842_18_01_17_6_02_51_244931932.png)