Question

Systole and diastole are due to
a) Auricular contraction and relaxation respectively.
b) ventricular contraction and relaxation respectively.
C) Auricular contraction and ventricular relaxation respectively.
d) Ventricular contraction and auricular relaxation respectively.​

Answer 1

Answer:

b is the write answer

mark brainlist answer

Answer 2

Answer:

Ans (b)

ventricular contraction and relaxation