Question

Cardiac excitation normally begins in the ...........



​

Answer 1

Answer:

Located in the wall of the right atrium is a group of specialised cells, called the Sinoatrial node (SAN). These cells, unlike most other cells within the heart, can spontaneously produce action potentials.

Explanation:

hope this helps U........

Mark as brainlist......

Answer 2

Explanation:

Initiation. Located in the wall of the right atrium is a group of specialised cells, called the Sinoatrial node (SAN). These cells, unlike most other cells within the heart, can spontaneously produce action potentials.

follow me mark as brainlist