2 Functions of the Circulatory System Transport of oxygen, nutrients and waste productsHelps regulate body temperature
3 Components Heart Blood Blood Vessels Primary organ that pumps blood through the entire bodyBloodThis nutrient rich liquid has everything your cells need to surviveIt also collects the waste your cells produceBlood VesselsRoads through the body that carry the blood to every single cellArteriesCapillariesVeins
4 Central OrganThe Heart - muscular organ that pumps blood through a network of blood vesselsMyocardium- major muscular portion of the heartPericardium- a thick membranous enclosure that protects the heart
5 Heart Anatomy A septum (wall) vertically divides into two sides Right- pumps blood to the lungsLeft- pumps blood to the other parts of the bodyUpper chambers- atriumLower chambers- ventricles
6 Flow of Blood in the Heart Coming from the body,blood is deoxygenated (low O2, rich in carbon dioxide)enters the:1. Superior and Inferior Vena Cava2. Into the Right atrium3. To the Right Ventricle4. Through the Pulmonary arteries5. To the capillaries of the lungsto exchange CO2 for O2
7 Flow of Blood in the Heart 6. From the lungs - the blood is rich in O27. Through the pulmonary veinsinto the Left Atrium8. To the Left Ventricle9. Through the Aortato the rest of the body
8 Heart ValvesValves- Flap of tissue that open in only one direction. Valves prevent blood from flowing backwards.
9 Heart Superior Vena Cava Aorta Pulmonary Arteries Pulmonary Veins Large vein that brings oxygen-poor blood from the upper part of the body to the right atriumAortaBrings oxygen-rich blood from the left ventricle to the rest of the bodyPulmonary ArteriesBring oxygen-poor blood to the lungsPulmonary VeinsBring oxygen-rich blood from each of the lungs to the left atriumLeft AtriumPulmonary ValvePrevents blood from flowing back into the right ventricle after it has entered the pulmonary arteryAortic ValvePrevents blood from flowing back into the left ventricle after it has entered the aortaRight AtriumMitral ValvePrevents blood from flowing back into the left atrium after it has entered the left ventricleTricuspid ValvePrevents blood from flowing back into the right atrium after it has entered the right ventricleLeft VentricleInferior Vena CavaVein that brings oxygen-poor blood from the lower part of the body to the right atriumSeptumRight Ventricle
10 Blood Blood is 45% cells and 55% plasma Blood Cells: Blood Plasma: Red Blood Cells: carry oxygenWhite Blood Cells: fight diseasePlatelets: stop bleeding by scabbingBlood Plasma:90% water10% nutrients and hormones
11 Blood VesselsVast network that keep the blood flowing in one directionArteries and arterioles- carry blood away from the heart.Arteries are large, muscular vessels. They are strong and elastic which allow them to stretch as blood enters from the heart.Arterioles are smaller and less muscular in size and turn into capillaries
12 Blood Vessels2. Capillaries – tiny blood vessels in networks that allows exchange of material through diffusion, between blood and cells in tissueVeinuoles- small blood vessels that carry deoxygenated blood away from the capillaries. They turn into veins.Veins- large blood vessels that carry deoxygenated blood to the heart. Veins have valves which prevents blood from flowing backwards.
13 Two Cardiovascular Pathways Pulmonary Circulation – blood that travels between the right side of the heart and lungs. Carbon dioxide diffuses out of the capillaries and oxygen diffuses in.Systemic Circulation – oxygenated blood that travels between the left side of the heart and all parts of the body except the lungs.
14 Blood VesselsArteryVeinCapillaryBlood Pressure is the force the heart puts on your arteriesHealthy is 120/80