The right ventricle pumps the blood to the lungs, where the blood releases waste gases and picks up oxygen. The newly oxygen-rich blood (shown in red) returns to the heart and enters the left atrium.

Our lungs are not identical. Our right lung has three lobes, and the left lung only two to make room for our heart. Lungs are ...

This clip is an introduction to the human heart. We find out about its location within the body and its function as a pump. The heart sits within the chest cavity between the lungs and is about ...

So we're inflating the lungs." As blood flows back into Katlyn's heart ... plus a real-life example of how the ear helps us to walk. The human eye. videoThe human eye This short film offers ...

Smoking can cause long-term negative effects on the body, including heart disease ... health conditions like glaucoma, cancer, and lung disease. It can also increase inflammation throughout ...