human transport system 0.0 / 5 ? BiologyCells, tissues and organsIGCSEEdexcel Created by: vanessaCreated on: 16-12-13 12:34 what are the four components of blood platelets, red blood cells, plasma, white blood cells 1 of 15 what are two adaptations of red blood cells biconcave shape so have more surface area, and no nucleus 2 of 15 what are the two components of white blood cells lymphocytes and phagocytes 3 of 15 how do white blood cells stop disease lymphocyte recognises the antigen on the pathogen and creates antibodies. The phagocyte recognises the antibodies and engulfs it (phagocytosis) 4 of 15 what are platelets responsible for clotting 5 of 15 why is clotting important stop entry of pathogens and losing blood 6 of 15 why do we have a double circulatory system there is less pressure on the heart 7 of 15 why do we have valves? they stop blood going the wrong way 8 of 15 which way does arteries and veins carry blood arteries away and veins to the heart 9 of 15 describe the lumen in the arteries and veins a small lumen in arteries with high blood pressure, and a wide lumen in veins with low blood pressure 10 of 15 what does a capillary do exchange nutrients and waste products with the cells 11 of 15 what is an adaptation of a capillary the wall is one cell thick 12 of 15 what is the order of the circulatory system! left atrium, left ventricle, pulmonary vein, aorta, hepatic artery, iliac artery, iliac vein, hepatic vein, inferior vena cava, superior vena cava, pulmonary artery, right atrium, right ventricle 13 of 15 what are three factors affecting heart rate exercise, adrenaline, smoking 14 of 15 what is a danger with smoking the carbon monoxide binds to the haemoglobin blocking oxygen from binding 15 of 15
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