Alveoli are tiny air sacs in your lungs that take up the oxygen you breathe in and keep your body going. Although they’re microscopic, alveoli are the workhorses of your respiratory system. People ...

Inhalation and exhalation is the same as breathing or ventilation and is a physical process which moves air into and out of your lungs. Respiration is not the same as breathing, and is a chemical ...

Rhys and Megan are on a camping trip. As they reach their destination it’s clear that Rhys is out of breath. Rhys asks Alfred, his science app, for advice on how to pitch a tent. Alfred explains that ...