Health: Age 12

3 illustrated Health lessons for Age 12.

Running and Resting When you run, your muscles need more oxygen. Your heart beats faster and your breathing speeds up to send oxyg…
Tooth Decay Stages Decay can start in a tiny pit on a tooth's outer surface. If it is not treated, it moves deeper into the tooth…
Air Under Snow When snow buries someone, the air around their face is trapped in a small pocket. That air is not replaced, so…