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Circulatory System

Circulatory System. Function. Carries oxygen, nutrients, and wastes throughout the body. Blood Vessels. Arteries carries blood from the heart to tissues of the body Capillaries smallest of the blood vessels, walls are only 1cell thick, real work done here Veins

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Circulatory System

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  1. Circulatory System

  2. Function • Carries oxygen, nutrients, and wastes throughout the body

  3. Blood Vessels • Arteries carries blood from the heart to tissues of the body • Capillaries smallest of the blood vessels, walls are only 1cell thick, real work done here • Veins returns blood to the heart

  4. Vessels Section 37-1 Vein Artery Capillary Oxygenated Blood Deoxygenated Blood

  5. Heart • Divided into 2 sections (pumps) 1. Pulmonary circulation: right side, pumps from the heart to the lungs oxygen poor blood 2. Systematic circulation: oxygen-rich blood, Flows in left side of heart then to the body with oxygen

  6. Valves • Found between atria and ventricles • Prevent blood from flowing back into the heart • Also pulmonary valves and one on the aorta

  7. Blood Flow through the Heart! Lungs 7 2 3 4 5 6 1 8 Your BODY

  8. A Song???? • "Pumps your Blood" by Anson Williams

  9. High Blood Pressure • Pulse: systolic= force felt in the arteries when the ventricles contract Diastolic= force felt in the arteries when the ventricles relax • AKA: Hypertension • Forces the heart to work harder, which may weaken or damage the heart muscle • Increases the risk for heart attack or stoke

  10. Heart Attack • Arteriosclerosis=blocked arteries • Part of the heart muscle may die due to lack of oxygen • Symptoms: nausea, shortness of breath, and severe crushing chest pain • Treated with drugs to increase blood flow to the heart, saving cells

  11. Stroke • Blood clots as a result of arteriosclerosis break free and get stuck in the vessels leading to part of the brain • Brain cells die due to lack of oxygen • Can also occur in weakened artery in the brain that bursts

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