To trace the flow of human blood?

Answer 1

Deoxygenated blood from the body enters the right atrium. It flows through the tricuspid valve into the right ventricle. Contraction of the ventricle then closes the tricuspid valve and forces open the pulmonary valve. Blood flows into the pulmonary artery. This branches immediately, carrying blood to the right and left lungs. Here the blood gives up carbon dioxide and takes on a fresh supply of oxygen. The capillary beds of the lungs are drained by venules that are the tributaries of the pulmonary veins. Four pulmonary veins, two draining each lung, carry oxygenated blood to the left atrium of the heart From the left atrium, Blood flows through the mitral valve into the left ventricle. Contraction of the ventricle closes the mitral valve and opens the aortic valve at the entrance to the aorta. The first branches from the aorta occur just beyond the aortic valve still within the heart. Two openings lead to the right and left coronary arteries, which supply blood to the heart itself.

Answer 2

Let's start at the inferior and superior vena cava. They carry O2 poor blood into the right atrium which then flows to the right ventricle through the tricuspid valve. The right ventricle pumps the blood through the pulmonary semi-lunar valve to the pulmonary artery. It then travels to the lungs so gas exchange can happen and the blood is now O2 rich. It goes back to the heart through the pulmonary vein and into the left atrium. The blood then flows to the left ventricle through the bicuspid valve. Then it goes to the Aorta through the aortic semi-lunar valve and travels to the rest of the body. After the blood is done in the body in goes to the superior and inferior vena cava and it starts all over again.

If you have any questions, just ask me!

Answer 3

Blood can be traced flowing through the vessels by injecting some sort of dye into the vein. This dye than can be observed through a diagnostic imaging equipment, like X Ray