1 Circulatory system

2 Learning goals I will be able to identify the structure and function of the circulatory system. I will be able to trace the flow of blood in the heart.

3 Function Transport materials Regulate body temperatureO2, CO2, waste, vitamins, nutrients, H2O Regulate body temperature Includes: Blood, arteries, veins, capillaries

4 Blood Red Blood Cells White Blood Cells Plasma PlateletsCarry oxygen to all cells and carbon dioxide to lungs White Blood Cells Fight infections Plasma Liquid part of blood; mostly water Platelets Help to clot the blood to stop bleeding

5 Blood Vessels Arteries Veins CapillariesCarry blood AWAY from the heart (usually oxygenated) Walls are thicker to withstand the greater pressure Veins Carry blood TOWARD the heart (usually deoxygenated) Walls are thinner because of lower pressure One way valves Capillaries Tiny, thin-walled blood vessels that allow the exchange of gases, nutrients and waste Some only fit one cell through at a time

6 Blood Vessels Oxygenated (red) Deoxygenated (blue)All arteries except 2 Pulmonary Arteries carry blood to the lungs Deoxygenated (blue) All veins except 2 Pulmonary veins carry blood from the lungs to the heart

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8 Arteries Arterioles Capillaries Venule VeinArteries to Veins Arteries Arterioles Capillaries Venule Vein Oxygenated blood Deoxygenated blood

9 Artery vs Vein

10 Capillaries

11 Heart Structure: 2 atriaReceive blood from body and pump to ventricles Thin walled 2 ventricles Pump blood to body tissues Thick, muscular walls Right side pumps deoxygenated blood to the lungs to get oxygenated Left side pumps oxygenated blood to the body

12 The Heart # Label 1 Aorta 2 Superior Vena Cava 3 Pulmonary Artery 4Pulmonary Vein 5 Right Atrium 6 Tricuspid Valve 7 Right Ventricle 8 Inferior Vena Cava 9 10 11 Left Atrium 12 Mitral Valve 13 Aortic Valve 14 Left Ventricle 15

13 Learning goals I will be able to identify the structure and function of the circulatory system. I will be able to trace the flow of blood in the heart.