A) Purkinje fibres
B) papillary muscles
C) SA-node
D) AV-node
Correct Answer: C
Solution :
The contraction of heart depends on small cluster of specialised muscle cells which are embedded in the upper wall of the right atrium. This cluster of cells is called the sino-atrial node (SA-node). It automatically and rhythmically sends out impulses that initiate each heartbeat.
You need to login to perform this action.
You will be redirected in
3 sec
