what is double circulation give examples?
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The pulmonary circuit transports blood to the lungs. The blood is oxygenated there and then carried back to the heart. Gaseous exchange happens in the lungs: carbon dioxide diffuses from the blood into the air in the alveoli.
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Answer:
The pulmonary circuit transports blood to the lungs. The blood is oxygenated there and then carried back to the heart. Gaseous exchange happens in the lungs:
- carbon dioxide diffuses from the blood into the air in the alveoli
- oxygen diffuses from the air in the alveoli into the blood, and is absorbed by haemoglobin in the red blood cells
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