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Gas Exchange in Humans, Inspired air, Expired air - Coggle Diagram
Gas Exchange in Humans
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Ribs
When exhaling, the Diaphragm is flattened; the external intercostal muscles contract; and the ribs rise up and outwards. It increases the volume of thorax and decrease the pressure inside thorax. This allows air outside the body to let in.
When inhaling, the Diaphragm rises up; the internal intercostal muscles contract; and the ribs relax. It decrease the volume of thorax and increase the pressure inside thorax. This forces air inside the body to be out.
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