Beakman talks about how important oxygen is and why we need it to live. Beakman acts like Joseph Priestly to explain that oxygen is needed for us to create energy. He uses an engine and a candle as demos to explain the need for oxygen to burn fuel.
After smoking tobacco for quite some time, the gang (Robin, Lily, Ted, Marshall, and Barney) starts to have health issues. Lily's voice becomes hoarse, Ted is easily fatigued due to the reduced flow of oxygen in his blood stream, and Arthur Hobbs, in an extreme situation, has a heart attack.
An introduction to the properties of H2O and its components: hydrogen and oxygen. This clip also explains that water has highest cohesion of any nonmetallic liquid, which allows other substances to stick to it.
Hank walks through the first stage of cellular respiration, Glycolysis, which is the breaking down of glucose. This stage is different from the other stages in that it is an anaerobic process, so it does not require oxygen. This video also covers the inputs and outputs of Glycolysis.