SnoopyBoy5951 SnoopyBoy5951

24-02-2020
Biology

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Valves of the heart open and close due to . Valves of the heart open and close due to . pressure changes timing sequences contraction of papillary muscles electrical signals None of the answers are correct.

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olatunbosunadeoke olatunbosunadeoke

24-02-2020

Answer: pressure changes

Valves of the heart open and close due to pressure changes

Explanation:

The veins are the blood vessels possessing valves. And because they carry blood away from the heart, the valves helps to prevent back flow of blood due to the low pressure of blood found in the veins.

Thus, Valves of the heart open and close due to pressure changes

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