Health: Age 16

3 illustrated Health lessons for Age 16.

Smoke in the airway Cigarette smoke stops the tiny cilia in your airways from moving, so mucus and tar stay stuck. It also damages…
Muscle acid and fatigue Hard exercise can make muscles acidic as hydrogen ions build up. Oxygen helps combine these ions into water, b…
Lab Fertilization Help Some couples need medical help to start a pregnancy. In a lab, sperm and an egg can be placed together so fert…