27th question please answer
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Answer: 27)
(i) Oxygenated blood: F (Left atrium) and B (Left ventricle)
De-oxygenated blood: E (Right atrium) and A (Right ventricle)
(ii) During double circulation in human beings blood passes through the heart twice for completing one cycle of circulation. The major advantage is that it increases efficiency of the organism.
The flowchart is,
LUNGS----->LEFT ATRIUM------>LEFT VENTRICLE----->BODY----->RIGHT ATRIUM----->RIGHT VENTRICLE----->LUNGS
this happens twice and is known as double circulation...
HOPE IT HELPS......
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