2 What you will learn about The heart 2What you will learn aboutin this topic:The heartThe heart as a double pumpThe circulatory and pulmonary systems
3 The heart 3Learning objectivesBy the end of this presentation you should be able to:Understand how the heart and the circulatory and plumonary systems workDescribe the heart as a double pumpExplain why systems are important to athletes
4 The circulatory system The heart 4The circulatory systemThe circulatory system involves the heart, blood vessels and blood itself. These are the three essential components the body needs to survive.
5 The heart 5The circulatory system is made up of two separate circuits that blood travels through: the pulmonary circuit and the systemic circuit.
6 The heart 6This is a double circulatory system and blood passes through the heart twice.
7 The functions of the circulatory system The heart 7The functions of thecirculatory systemOxygen and nutrients are transported to parts of the body, while waste or toxic products are removed.The balance of nutrients keeps the body functioning properly.
8 The body relies on these actions to stay alive. The heart 8The body relies on these actions to stay alive.The circulatory system controls body temperature. The body is affected by changes to temperature, so keeping it in an acceptable range keeps the body functioning properly.
9 The heart 9The circulatory system also helps protect the body; antibodies in the blood fight disease and platelets help to clot the blood at the source of a cut to prevent other germs entering the body.
10 The heart 10Task 1Create prompt cards by writing down the main functions of the circulatory system on A6 size cards.Make sure they are neat and concise. They will help you to revise later on!Teacher’s notesTo help lower-ability students, key words could be provided. Higher-ability students could develop further prompts by writing possible questions on other cards with the answers on the reverse.
12 Blue arrows usually denote the veins, showing deoxygenated blood. The heart 13On heart diagrams, red arrows usually denote the arteries, showing oxygenated blood.Blue arrows usually denote the veins, showing deoxygenated blood.
13 Task 2 Draw a copy of the heart diagram and label it. Show the flow of blood through the heart on your diagram. Use colour (red and blue) to show where the blood is oxygenated and deoxygenated.Teacher’s notesLower-ability students could be provided with a printout of the relevant slide so they can annotate the main parts of the heart. Higher-ability students could devise a way of linking the diagram to other parts of the circulatory systems and show them in the diagram. They could also add in extra details such as effects of exercise on the heart.
14 The heart acts as a pump in the double circulatory system. The heart as a pumpThe heart acts as a pump in the double circulatory system.
15 The heart 16When the heart beats (contracts) it is called systole. This action forces blood through the arteries around the body.When the heart relaxes it fills with blood returning from the veins. This is called the diastole or diastolic phase.
16 The heart 17The pulmonary circuit carries deoxygenated blood from the heart, from the right ventricle, to the lungs, via the pulmonary artery; the blood is then oxygenated (carbon dioxide is removed from the blood in the lungs).
26 The heart 27The right side of the body pumps deoxygenated blood (blood with no oxygen in it) to the lungs.Oxygenated blood
27 The heart 28The left side pumps oxygenated blood (blood with more oxygen in it) from the lungs to the rest of the body.Deoxygenated blood
28 The heart 29The septum divides the left and right sides of the heart so that oxygenated and deoxygenated blood do not mix.Septum
29 The heart 30The left ventricle wall is thicker than the right side. It is more developed as it pumps blood further around the body.Left ventricle
30 The heart 31Sets of valves are positioned in the heart to stop the backflow of blood.Semi-lunar valve
31 The heart 32Task 3Draw a diagram in your work book showing the pulmonary and systemic systems.Clearly label your diagram.Teacher’s notesProvide lower-ability students with a printout of the relevant slide to label. High-ability students should carry out this task without the help of the Student’s Book.
32 The heart 33Task 4As a class, discuss why you think the circulatory system is important to sportspeople.
33 The heart 34Exam questions1. Which of the following best describes the pulmonary circuit?Heart – pulmonary arteries – lungs –pulmonary vein – heartHeart – aorta – lungs – pulmonary vein – heartHeart – pulmonary arteries – capillaries – lungs – pulmonary vein – heartHeart – pulmonary arteries – lungs – vena cava – heartTeacher’s notesCorrect answer is 1A.
34 What you have learnt in this topic: The heart 35What you have learntin this topic:The heartThe heart as a double pumpThe circulatory and pulmonary systemsFunctions of the circulatory system
35 Learning objectives You should now be able to: The heart 36Learning objectivesYou should now be able to:Understand how the heart and the circulatory and pulmonary systems workDescribe the heart as a double pumpExplain why systems are important to athletes