9.1. Circulatory systems
A subsection of Biology, 0610, through 9. Transport in animals
Listing 10 of 45 questions
For Examiner's Use shows a diagram of the human circulatory system. small intestine head and arms leg muscles kidneys liver lungs right ventricle left ventricle right atrium left atrium H G F Name the blood vessels labelled F, G and H as shown on . F G H State two ways in which the blood entering leg muscles differs from the blood leaving leg muscles. For Examiner's Use Humans have a double circulation, as shown in . Explain the advantages of humans having a double circulation.
0610_s13_qp_21
THEORY
2013
Paper 2, Variant 1
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All mammals have a double circulatory system. shows part of the human double circulatory system. A D C B left lung right lung P O J K muscular wall of heart left kidney right kidney N L M Name the muscular wall that separates the left and right sides of the human heart. Describe what is meant by the term double circulation. State one advantage of a double circulation. 1 10 Table 1.1 describes some of the structures of the human circulatory system shown in Fig.1.1. Complete the table. One row has been done for you. Table 1.1 letter on name of structure description heart chamber with the thickest muscular wall blood vessel that carries oxygenated blood to the heart blood vessel that carries oxygenated blood away from the heart blood vessel that carries blood away from the kidneys N vena cava blood vessel with the largest lumen Describe how blood is transported from the vena cava to the lungs. You may use the letters on in your description. [ 1 10 Doctors recommend that a healthy diet can reduce the risk of coronary heart disease. Give one other lifestyle improvement patients can make that can reduce the risk of coronary heart disease. Sometimes surgery is required to treat coronary heart disease. Describe one named example of surgery that can treat coronary heart disease. 1 10
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THEORY
2016
Paper 4, Variant 2
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Questions Discovered
45