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The Heart: Associated Great Vessels

The Heart: Associated Great Vessels. Pulmonary veins (four) Enter left atrium A rteries: A way from heart, have thicker walls (red-oxy) Veins: Towards, thinner walls (blue-deoxy) Exception: Pulmonaries Pulmonary artery (blue) Pulmonary vein (red). Pathway of Blood Flow through the Heart.

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The Heart: Associated Great Vessels

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  1. The Heart: Associated Great Vessels • Pulmonary veins (four) • Enter left atrium • Arteries: Away from heart, have thicker walls (red-oxy) • Veins: Towards, thinner walls (blue-deoxy) • Exception: Pulmonaries • Pulmonary artery (blue) • Pulmonary vein (red)

  2. Pathway of Blood Flow through the Heart • Deoxygenated blood from the body and heart muscle is returned to the right atrium of the heart via superior/inferior vena cavae. AV valves open. • Blood flows from r.atrium through the tricuspid valve into the right ventricle. Atria begin to contract as blood fills the r. ventricle. • The r. ventricle contracts(AV valves close), pumping blood through the pulmonary semilunar valves into the pulmonary trunk.

  3. Pathway of Blood Flow through the Heart • Pulmonary trunk branches into the pulmonary arteries. The deoxgenated blood moves from the pulmonary arteries into the lungs. • In lungs, oxygen is picked up and carbon dioxide is unloaded. • Oxygenated blood returns to heart by pulmonary veins. • Pulmonary veins empty into the left atrium.

  4. Pathway of Blood Flow through the Heart • Blood flows from l. atrium to the l.ventricle through the bicuspid valve. Left atrium contracts to push the rest of the blood into the ventricle. • L. ventricle contracts, pumping blood through the aortic semilunar valve, then into the aorta. • Aorta branches into the arteries, which carries blood throughout the body. Blood is constantly coming in both sides and leaving out http://www.mydr.com.au/heart-stroke/animation-how-your-heart-pumps

  5. Coronary Circulation • Blood in the heart chambers does not nourish the myocardium • The heart has its own nourishing circulatory system • Coronary arteries are the first branches of the aorta and they take blood to the heart muscle • Cardiac veins return blood from heart muscle • Blood empties into the right atrium via the coronary sinus (vein)

  6. Pumps Your Blood Song • http://www.dgs.k12.il.us/PumpYourBlood.mp3 • http://www.dgs.k12.il.us/heart.htm

  7. External Heart Anatomy http://www.nhlbi.nih.gov/health/dci/Diseases/hhw/hhw_pumping.html Figure 11.2a

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