Rate of heart beat decreases during:
Match the following:
Match the following :
Column I Column II
(i) Fibrous pericardium a. Decreases friction created during the beating of heart
(ii) Visceral pericardium b. Anchors the heart.
(iii) Pericardial fluid c. Helps in the contraction of heart.
(iv) Myocardium d. Protects the cardiac muscle.
Louder sound of heart beat occurs during closure of