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Slide 2 The Circulatory System Slide 3 OB14, OB15 Understand the structure and function of the heart, identify the four chambers of the heart, and explain the difference between the left and right ventricles Describe the passage of blood through the heart and lungs via arteries and veins, identify the pulmonary artery and vein, aorta and vena cava, and distinguish between arteries, veins and capillaries Slide 4 There are THREE types of blood vessels ARTERIES Carry blood away from the heart Thick, muscular, stretchy wall Narrow central tube Slide 5 VEINS Carry blood towards the heart Thin walls with little muscle Wide central tube Have valves stop the blood flowing backwards Slide 6 HEART LUNGS VEIN carrying deoxygenated blood back to heart ARTERY carrying oxygenated blood to leg Circulatory system Artery red Vein - blue Slide 7 CAPILLARIES carry blood between arteries and veins wall only one cell thick very narrow central tube Slide 8 All Blood Vessels Artery Thick Walls Blood from heart Veins Thin walls Blood to heart Contain valves Capillaries Very thin walls and tube Carry oxygen and food to cells Slide 9 Thick muscular walls Divided into 4 chambers Right side pumps blood to lungs Left side pumps oxygenated blood from the lungs to ALL parts of body Slide 10 Slide 11 The heart is divided into FOUR chambers Right Ventricle Right Atrium Left Atrium Left Ventricle Slide 12 The heart has four major blood vessels VENA CAVA PULMONARY VEIN AORTA PULMONARY Artery VENA CAVA From body To body From lungs To lungs Slide 13 Slide 14 Slide 15 The pulse can be felt at: A healthy heart at rest will beat 70 times every minutehealthy heart Slide 16 ..\..\..\blood around body\Blood around body.exe..\..\..\blood around body\Blood around body.exe Slide 17 Heart Slide 18 Inside every cell oxygen is added to glucose in RESPIRATION to produce WATER + CARBON DIOXIDE + Slide 19 Draw a flow chart Show the route of a red blood cell 1.Starting at lungs and moving via heart to arm 2.Leaving the arm and returning back to the lungs 3.Labelled oxygenated blood cells (red), deoxygenated blood cells (blue), the heart, lungs, arteries and veins Slide 20 Slide 21 The Blood The blood has three main purposes Transport stuff around the body (Food, Oxygen, Carbon Dioxide and Urea) Defence (White Blood Cells) Clotting (Platelets) Slide 22 Parts of the Blood Plasma This is the name for the liquid that all the cells float in. Mostly water with Glucose, Protein and Urea dissolved in it. Slide 23 Parts of the Blood Red Blood Cells Carry the oxygen around the body. The oxygen combines with HAEMOGLOBIN to turn the blood red. When there is no oxygen in the Haemoglobin it turns purple. Slide 24 Parts of the Blood White Blood Cells Eat the bacteria that invade the body. Forming the main part of the IMMUNE SYSTEM. Some can also produce anti-bodies. Slide 25 Parts of the Blood Platelets Allow the blood to clot by all rushing to the injury. Slide 26 Slide 27 Slide 28 All Blood Vessels Artery Thick Walls Blood from heart Veins Thin walls Blood to heart Contain valves Capillaries Very thin walls and tube Carry oxygen and food to cells Slide 29 Left side muscle is thicker as it has to pump the blood to all parts of the body. The right side just takes it to the lungs Slide 30 Blood Summary TypeFunctionAppearance Plasma Carries glucose, protein and waste. Clear Liquid Red Blood Cell Carry Oxygen to cells in Haemoglobin Red or blue White Blood Cell Prevent Disease and attack invaders Many different cells Platelets Clot the bloodFragments of cells Slide 31 The blood mobile Nominated for 6 Oscars by .. Slide 32 H/W P54 1,2,3,6,7