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On land, the semilubar valce of crocodilians prevents deoxygenated blood from flowing from right ventricle to...

On land, the semilubar valce of crocodilians prevents deoxygenated blood from flowing from right ventricle to right aorta. Both aortas are supplied with oxygenated blood from the left ventricle. When a crocodile dives, however, pressure forces open the semilunar valce so that the left aorta us supplied by the left ventricle ans the right aorta is supplied by the right ventricle. What might be the advantage of this during a dive?

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The function of semilunar valve is to prevent the entry of deoxygenated blood in to the right ventricle into right aorta . When the crocodile dive it need huge amount of energy and therefore heart pumps at faster rate to provide the oxygen to the tissue. Therefore if deoxygenated blood is mix with oxygenated blood the crocodile will not get enough oxygen to perform diving but due to the presence of semilunar value, as oxygenated blood is full of oxygen it can provide high amount of oxygen to the tissue of crocodile required at the time of diving.

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