¡Eres una reacción química gigante!

The video explains the process of respiration, a vital chemical reaction that provides energy. It describes how digestion and breathing supply glucose and oxygen, which react in cells to release energy, producing carbon dioxide and water as byproducts. The video also covers how the body excretes these byproducts and the increased energy demand during exercise.

What role does the digestive system play in respiration?

Explain how our body responds to exercise in terms of energy and breathing.