ANATOMY

GENERAL ANATOMY

ANATOMY OF THE HEART

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Where is the sinoatrial node located?
A
right atrium
B
right ventricle
C
left atrium
D
left ventricle
Explanation: 

Detailed explanation-1: -It is located at the junction of the crista terminalis in the upper wall of the right atrium and the opening of the superior vena cava. These cells have the ability to spontaneous generate an electrical impulse.

Detailed explanation-2: -The sinoatrial node (SAN), located in the right atrium, serves as the primary site for initiation of the normal heartbeat (sinus rhythm) (Figure 1).

Detailed explanation-3: -The SA node called the sinoatrial node lies in the wall of the right atrium near the opening of the superior vena cava. Q. Assertion :The SA node acts as pacemaker Reason: The SA node is located in the wall of the right atrium near the interatrial septum.

Detailed explanation-4: -The SA (sinoatrial) node generates an electrical signal that causes the upper heart chambers (atria) to contract. The signal then passes through the AV (atrioventricular) node to the lower heart chambers (ventricles), causing them to contract, or pump. The SA node is considered the pacemaker of the heart.

Detailed explanation-5: -The CS arises in the SA node, which is found in the upper anterior right atrium (Figure 1).

There is 1 question to complete.