[A] valves in heart You must know that in human beings, valves in heart, ensure that blood does not flow backwards, when the atria or ventricles contract. Hence, your answer will be option [A].
[A] valves in heart
You must know that in human beings, valves in heart, ensure that blood does not flow backwards, when the atria or ventricles contract. Hence, your answer will be option [A].
Which one of the following is the main cause of land degradation in Punjab?
Overgrazing
Overgrazing
See lessRabi crops are sown from
(D) October to December
(D) October to December
See lessWhat prevents back flow of blood inside the heart during contraction?
[A] valves in heart You must know that in human beings, valves in heart, ensure that blood does not flow backwards, when the atria or ventricles contract. Hence, your answer will be option [A].
[A] valves in heart
See lessYou must know that in human beings, valves in heart, ensure that blood does not flow backwards, when the atria or ventricles contract. Hence, your answer will be option [A].