# Circulation & Breathing Together

Understand how the circulatory and respiratory systems work together: the lungs oxygenate the blood, the heart pumps it around the body, cells use the oxygen and produce carbon dioxide waste, and the blood carries the waste back to the lungs to be breathed out

Builds on: Heart & Blood Circulation (hard, https://ai.page/c/heart-and-blood-circulation/en.md), How the Lungs Work (hard, https://ai.page/c/how-the-lungs-work/en.md)

Concept id: circulation-and-breathing-together. Subject: science. Licence: CC BY-SA 4.0.

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