In addition to explaining why oxygen is breathable. this video offers information on the Earth's atmosphere. Learn how it protects living organisms and why it is blue in color. [6:18]

Take a breath and think of scientist-theologian Joseph Priestley, the discoverer of oxygen.

This brief video provides a glimpse of the properties of oxygen. Learn the cycle of how people and animals breathe in oxygen, but plants breathe it out, a process known as photosynthesis. [1:36]

In this video, Paul Andersen explains the importance of oxygen in accepting electrons. He begins with a brief description of combustion. He then explains the role of oxygen in aerobic cellular respiration. Do you speak another language?