Question

Describe the flow of blood in the human body cluding through each of the four chambers of the heart

Answer 1

@Jaymiegaucher The human heart has four chambers: two ventricles, each of which is a muscular chamber that squeezes blood out of the heart and into the blood vessels, and two atria, each of which is a muscular chamber that drains and then squeezes blood into the ventricles. The two atria reside at the top of the heart; the two ventricles are at the bottom. And, the heart is divided into left and right halves, so there is a left atrium and left ventricle, as well as a right atrium and right ventricle.

The heart is divided into halves is because of the two-circuit circulatory system. The right side of the heart can pump blood to the lungs, while the left side of the heart pumps blood to the rest of the body. Blood goes in both directions on each and every pump.



Some points to remember:
KEY POINTS[ edit ]

\(1\)The right and left atria are the top chambers of the heart and receive blood into the heart. The right atrium receives deoxygenated blood from systemic circulation and the left atrium receives oxygenated blood from pulmonary circulation.
\(2\)The atria do not have inlet valves, but are separated from the ventricles by valves.
\(3\)The atria facilitate circulation by allowing uninterrupted blood flow into the heart during ventricular systole.
\(4\)The right and left ventricles are the bottom chambers of the heart. They have thicker walls than the atria, and they create higher blood pressures to pump blood out of the heart into circulation to the body and the lungs.
\(5\) The right ventricle pumps deoxygenated blood into pulmonary circulation. The left ventricle pumps oxygenated blood into systemic circulation.
\(6\)Systole describes ventricular contraction, when blood is pumped from the heart into circulation.
\(7\)Diastole describes ventricular relaxation, when blood moves from the atria to the ventricles, and the ventricles fill in preparation for systole.