Answer:
The flow of blood through the heart starts with blood entering the right atrium from the superior and inferior vena cava then going into the right ventricle. This blood then leaves the body through the pulmonary arteries, where it will go to the lungs to receive oxygen. The blood now returns through the pulmonary veins and into the left atrium to get pumped through the left ventricle to get pumped to the aorta artery to the body.
Step-by-step explanation:
The pulmonary circulation starts with deoxygenated blood entering the heart's right atrium. This blood enters the right atrium through the superior and inferior vena cava. Then it passes through the tricuspid valve to the right ventricle. The right ventricle pumps the blood to the pulmonary arteries. These arteries will take the blood to the pulmonary arterioles and then to the capillaries in the lungs. At this level, the blood gets oxygen and drops carbon dioxide. From the capillaries in the lungs, the oxygenated blood goes to the venules, then to the pulmonary veins. The pulmonary veins take the blood to the left atrium. In the left atrium, the blood passes through the mitral valve to the left ventricle. Then, it is pumped to the aorta artery to go to the rest of the body.