Question
Biology Question on Circulatory Pathways
The name of the pace maker of the heart is
A
Lymph node
B
S.A. node
C
Juxtaglumerular apparatus
D
Semilunar valve
Answer
S.A. node
Explanation
Solution
SA node is a pacemaker of the heart. It is a small mass of specialised muscle cells in the mammalian heart, found in the wall of the right atrium near the opening for the vena cava. The cells initiate and maintain the heart beat.