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The lungs - clearly, their role is obvious.

The heart, pumps oxygen rich blood around the body.

Red blood cells - they are loaded with Hemoglobin which bonds with the oxygen forming oxyhemoglobin - in English - it turns the oxygen into a weakly bonded solid so the oxygen can flow through the blood stream. red blood cells are a bi-concave disc, Red blood cells are also not an organ but the role they play is super important.

Hope this helps!

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12y ago
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11y ago

teeth bones ligament

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Q: What organ or body part in involved in the respiratory system?
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