Question

The commands of the heart starts from _______

Answer 1

Answer:

Sino atrial node or SA Node

Answer 2

Answer:

SAN or Sinoatrial Node

Explanation:

The sinoatrial node (also known as the SAN) is a group of cells located in the wall of the right atrium of the heart.

Hence Human heart is Myogenic i.e excitation is commanded by muscles instead of neurons.