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Grade 10 Science: Heart Worksheet Mr.Krstovic 1. The diagram below shows an external view of the mammalian heart. Show the positions of the following structures on the diagram. Right atrium, left atrium, right ventricle, left ventricle, aorta, inferior vena cava, Pulmonary artery, coronary artery, superior vena cava. 2. The diagram below shows a section through the heart seen from the same direction as the external view in question 1. a) Label the following structures: right atrium, left atrium, right ventricle, left ventricles, inferior vena cava, superior vena cava, aorta, pulmonary artery, pulmonary vein, tricuspid valve, mitral (bicuspid) valve b) On the diagram of the heart shown above indicate the direction of blood flow through the heart. Use RED to show the pathway of oxygen-rich blood and BLUE the pathway of oxygen-poor blood. 3. Choose terms from the list to complete the sentences below. atria; right hand side; vena cava; ventricles; valves; pulmonary artery; veins; arteries; left hand side; aorta, coronary artery; The top two chambers of the heart are called __________________. These structures stop blood flowing backwards into the atria _______________. This side of the heart receives oxygenated blood ___________________. This is the largest artery in the body ____________________. These are blood vessels that carry blood towards the heart _______________. This blood vessel supplies the heart muscle with oxygenated blood. ________________ 4. Fill in the name of the blood vessel in the table below. Towards or Name of blood vessel Blood? Walls? away from heart Oxygenated Thin Towards Oxygenated Thick Away from Deoxygenated Thick Away from Deoxygenated Thin Towards 5. Arrange these events in the correct order starting. _____ The left ventricle contracts and blood flows along the aorta to the body _____ The blood flows through the tricuspid valve into the right ventricle. _____ Oxygenated blood flows along the pulmonary veins into the left atrium _____ The blood passes through the mitral valve into the left ventricle _____ The left atrium contracts __1__ Deoxygenated blood flows from the inferior and superior vena cavae into the right atrium. _____ The deoxygenated blood picks up oxygen _____ The right atrium contracts _____ The right ventricle contracts and blood flows along the pulmonary artery to the lungs Heart Worksheet Answers 1. The diagram below shows an external view of the mammalian heart. 2. The diagram below shows a section through the heart seen from the same direction as the external view in question 1. 3. Choose words from the list to complete the sentences below. a) The top two chambers of the heart are called atria. b) These structures stop blood flowing backwards into the atria. valves b) This side of the heart receives oxygenated blood. Left hand side c) This is the largest artery in the body. Aorta d These are blood vessels that carry blood towards the heart. Veins g) This blood vessel supplies the heart muscle with oxygenated blood. Coronary artery 4. Fill in the name of the blood vessel in the table below. Towards or Name of blood vessel Blood? Walls? away from heart Pulmonary vein Oxygenated Thin Towards Aorta Oxygenated Thick Away from Pulmonary artery Deoxygenated Thick Away from Vena cava Deoxygenated Thin Towards 5. Arrange these events of one complete heart beat cycle in the correct order starting with F. F. Deoxygenated blood flows from the inferior and superior vena cavae into the right atrium. H. The right atrium contracts B. The blood flows through the right tricuspid valve into the right ventricle. I. The right ventricle contracts and blood flows along the pulmonary artery to the lungs G. The deoxygenated blood picks up oxygen C. Oxygenated blood flows along the pulmonary veins into the left atrium E. The left atrium contracts D. The blood passes through the mitral valve into the left ventricle A. The left ventricle contracts and blood flows along the aorta to the body