MEDIUM
NEET
IMPORTANT
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The given graph shows pressure changes in the left side of the heart during a single heartbeat.
Between points and , which of the following valves are open or closed respectively?
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Important Questions on Practice Papers - I
EASY
NEET
IMPORTANT
Which of these epithelia is chiefly involved in function like diffusion and thereby is found in the wall of blood vessel and air sacs of the lungs?
