Learning Objectives AO1 List the different blood vessels found in the body AO2 Describe the process of the redistribution f blood AO3 Explain the effects exercise has on the redistribution of blood ID: 1014960
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1. 1.3 Blood Vessels and Redistribution of Blood Learning ObjectivesAO1: List the different blood vessels found in the body. AO2: Describe the process of the redistribution f blood. AO3: Explain the effects exercise has on the redistribution of blood.
2. Without looking in your book draw the pathway of blood from memory?123456
3. This involves the HEART, BLOOD VESSELS & BLOOD.Cardiovascular SystemWhy is the circulatory system key to physical education?List 5 key facts from the video
4. Once blood leaves the heart, it is transported around the body in three main types of blood vessels: Arteries Veins Capillaries Blood vessels
5. Arteries transport the oxygenated blood away from the left side of the heart. Arteries carry blood under a high pressure.The largest artery in the body, connected directly to the heart, is the Aorta.Blood vessels
6. Veins transport blood from all over the body back to the heart and lungs for re-oxygenation. They are blue because they carry blood that is full of waste products, and are low in oxygen. Veins carry blood under a low pressure.Blood vessels
7. An unique feature of veins is that they have valves. Like the valves in the heart, they are there to prevent a backflow of blood. The blood must flow in one direction only, against gravity in most cases, back to the heart.Blood vessels
8. Capillaries are small blood vessels that carries blood to and from the body’s cells.They are one cell thick and are exchange points where oxygen and carbon dioxide cross into the tissue cells (muscles) from the arterioles. Blood vessels
9. Below is a summary of the differences between arteries and veins?
10. The body uses two mechanisms to control this redistribution. Vasoconstriction (narrowing) and Vasodilation (expanding) is used to redistribute blood to essential areas of the body while decreasing blood flow to others.Answer the following questions...Where is the blood needed during exercise?Where is blood needed just after a meal?What will happen to blood vessels around the muscles?Redistribution of blood during exercise
11. Redistribution of blood during exerciseDuring exercise, blood flow to muscles increases to meet the increase in oxygen demand. This redirection of blood flow to the areas where it is most needed is known as a vascular shunt.
12. Explain the function of the arteries in the cardio-vascular system. (3 marks)2. Explain the function of the veins in the cardio-vascular system. (3 marks)3.Explain how the cardio-vascular system distributes blood when exercising. (4 marks)Circle the command words Underline key informationList key words that link to the question. Set out purposes or reasons (AO2)The purpose of arteries in the cardiovascular system are to carry oxygenated blood away from the heart. (1) Its walls are thick and elastic (1) and have no valves as the blood travels at high pressure. (1)
13. Explain the function of the arteries in the cardio-vascular system. (3 marks)2. Explain the function of the veins in the cardio-vascular system. (3 marks)3.Explain how the cardio-vascular system distributes blood when exercising. (4 marks)Circle the command words Underline key informationList key words that link to the question. Set out purposes or reasons (AO2)
14. The purpose of arteries in the cardio-vascular system are to transport oxygenated blood away from the heart (1). They have thick walls and do not any valves (2).The purpose of veins in the cardio-vascular system are to transport deoxygenated blood back to the heart (1). They have thin walls and have valves to stop the backflow of blood (2).The cardio-vascular system redistributes blood around the body in two ways. One was is through vasodilation (1). This is when the blood vessels widen to allow more blood to flow to areas of the body where it is needed the most, for example, the muscles during exercise (2). Another way is through vasoconstriction (3). This is when the blood vessels narrow, restricting the blood flow to areas of the body where it is needed the least. For example, the gut (4).Use these answers to mark your work.Use a different coloured pen