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The sa node ____________ fires at regular intervals.

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The sa node spontaneously fires at regular intervals.

What is SA node?

SA node; an accronym for sinoatrial node is a mass of specialized issue situated in the heart; specifically in the right upper chamber of the heart.

This sinoatrial node help the heart generates electrical stimulus regularly usually between 60 to 100 times per every minutes

What is heart?

The heart is a muscular organ and the only organ in the known which helps to pump blood to various parts of the body

Helps in the mentenance of blood pressure
It helps to pump oxygenated blood
It helps to transfer hormones
Helps to receive deoxygenated blood as well

Learn more about SA node of the heart:

https://brainly.com/question/9058294

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