Question

11. Which of the following events
takes place in human heart when it
pumps the blood into arteries:- (i)
contraction of ventricles (ii)
contraction of Atria (iii) closure of
semilunar valves (iv) closure of
auriculo ventricular valves. *
O (i) and (ii)
O (ii) and (ii
)
O (i) and (iii)
O (i) and (iv)​

Answer 1

Answer:

( contact of atria of se be able coming to all my dear)