Blood flows through your heart, lungs and body in a series of steps. After delivering oxygen and nutrients to all your organs and tissues, your blood enters your heart and flows to your lungs to gain …

Apr 13, 2024 · Learn about the path of blood through the heart. See the atria, ventricles, and valves and step-by-step circulation.

The systemic circulation is a circuit loop that delivers oxygenated blood from the left heart to the rest of the body, and returns deoxygenated blood back to the right heart via large veins known as the venae …

Jun 25, 2025 · Arteries and veins link your heart to the rest of the circulatory system. Veins bring blood to your heart. Arteries take blood away from your heart. Your heart valves help control the direction …

Apr 17, 2026 · Molecules are normally conveyed between cells and throughout the body of multicellular organisms in a circulatory fluid, called blood, through special channels, called blood vessels, by …

Oct 7, 2025 · Learn the order of blood flow through the heart, including its chambers and valves, and understand how issues like valve disease affect circulation.

Oct 10, 2025 · As the heart pumps, blood pushes out into arteries. These strong, smooth blood vessels carry blood at high pressure to all parts of your body. They branch out to all the different parts of your …

Watch these videos to learn more about how the heart works, blood flow in arteries and veins, blood pressure, and lymphatics.

Blood flow is regulated by vasoconstriction or vasodilation of smooth muscle fibers in the walls of blood vessels, typically arterioles. This regulation can be systemic, affecting the whole of the circulatory …

As the heart pumps, blood is pushed through the body through the entire circulatory system. Oxygenated blood is pumped away from the heart to the rest of the body, while deoxygenated blood …