The Pacemaker

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As an individual thinks about the heart they may not fully understand the amount of work that the heart does in order to keep the blood flowing throughout the body. The heart is made up of four chambers and two pumps. The top half of the heart is made up of a right and left atrium while the bottom portion of the heart is made up of a right and left ventricle. The right side of the heart pumps blood throughout the pulmonary circuit which supplies blood to the lungs. While the left side of the heart pumps blood through the systemic circuit which supplies blood to the tissues, muscles, and organs of the body.
Now in order for the heart to pump blood throughout the pulmonary and systemic circuits properly the SA node, also known as the pacemaker

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