Question

what is sa node?? explain in 100 words how thy produced?

Answer 1

The sinoatrial node (SA node), also known as sinus node, is a group of cellslocated in the wall of the right atrium of the heart.[1] These cells have the ability to spontaneously produce an electrical impulse (action potential; see below for more details), that travels through theheart via the electrical conduction system (see figure 1) causing it tocontract. In a healthy heart, the SA node continuously produces action potential, setting the rhythm of the heart and so is known as the heart's natural pacemaker. The rate of action potential production (and therefore the heart rate) is influenced by nerves that supply it.

Answer 2

SAN or sino auricular node
@ it is an impluse send by the medulla oblongata
@this impulse is recieved at the base of the heart; ending of the spetum that is the middle part of ventricle
@its function is initiate the beating of heart