Biology, asked by ChiragJaiswal, 1 year ago

What is sinutrial node

saniya3774: The SA node is the heart's natural pacemaker. The SA node consists of a cluster of cells that are situated in the upper part of the wall of the right atrium (the right upper chamber of the heart). The electrical impulses are generated there. The SA node is also called the sinus node.

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Answered by Anonymous

The SA node is the heart's natural pacemaker. The SA node consists of a cluster of cells that are situated in the upper part of the wall of the right atrium (the right upper chamber of the heart). The electrical impulses are generated there. The SA node is also called the sinus node.

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Answered by royricha42002

Hey mate here is your answer:-)

In the upper part of the right atrium of the heart is a specialized bundle of neurons known as the sinoatrial node (SA node). Acting as the heart's natural pacemaker, the SA node "fires" at regular intervals to cause the heart of beat with a rhythmn of about 60 to 70 beats per minute for a healthy, resting heart. The electrical impulse from the SA node triggers a sequence of electrical events in the heart to control the orderly sequence of muscle contractions that pump the blood out of the heart.

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ChiragJaiswal: Thank you

saniya3774: wlc

ChiragJaiswal: I ask one more question

ChiragJaiswal: The oxygen-rich blood from the lungs comes into the.............. Of the heart

ChiragJaiswal: Plz reply

saniya3774: Oxygen-rich blood flows from thelungs back into the left atrium (LA), or the left upper chamber of the heart, through four pulmonary veins. Oxygen-rich blood then flows through the mitral valve (MV) into the left ventricle (LV), or the left lower chamber.

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