Rhythmical contraction is noticed in

Arrange following events correct sequence : (a) Division of zygote to form embryo. (b) Rhythmic contractions of muscles in the uterus. (c) The lining of uterus thicken and richly supplied with blood. (d) Embryo develops organs to become foetus. (e) Embryo gets nutrition with the help of placenta.

The rhythmic contraction and expansion of heart is called.............

X is the rhythmic contraction and relaxation in the aorta and its main arteries. What is X ?

Cardiac muscles undergo rhythmic contraction and relaxation throughout life.

X" is the rhythmic contraction and relaxation in the aorta and its main arteries. What is X ?

X is the rhythmic contraction and relaxation in the aorta and its main arteries. What is X ?