Learn all of the different ways to maximize the amount of particles that diffuse over a short distance over time.

After drinking a few glasses of water on a hot day, you might be struck with a sudden, urge. Behind that feeling are two bean-shaped organs that work as fine-tuned internal sensors. This video details how the kidneys balance the amount...

Find out whether oxygen or carbon dioxide has a higher rate of diffusion in this video lecture. Lecture discusses the euqation to find out how to relate diffusion of gases to their molar masses. [8:56]

Watch as a molecule of oxygen makes its way from the alveoli (gas layer) through various liquid layers in order to end up in the blood. [11:46]

Get an intuition for why carbon dioxide is so much more soluble than oxygen when it goes into water. [7:45]

Explores the relationship between partial pressure of a gas and the concentration of the gas molecule within a liquid. [8:39]

Find out how to calculate exactly how much oxygen is deep down inside your lungs. Rishi is a pediatric infectious disease physician and works at Khan Academy. [7:06]

Find out how to calculate exactly how much oxygen is deep down inside your lungs with this video! Also understand the path air travels as it is brought into the body. [7:58]

Find out how to calculate exactly how much oxygen is deep down inside your lungs! [7:5]

Follow the path that oxygen takes as enters the body with this video. [1:30]