B2- Animal and Plant Transport 0.0 / 5 ? ScienceBiologyGCSEAQA Created by: Wynnie24Created on: 18-03-19 19:02 What is a double circulatory system? Blood passes through the heart twice in one cycle 1 of 18 Arteries definition 1) Have thick muscular walls 2) Carry blood away from the heart 2 of 18 Veins definition 1) Are thin-walled wide vessels that carry slow flowing blood 2) Carry blood back to the heart 3 of 18 Capillaries definition 1) Allow important substances in the blood to pass into the fluid around cells 2) Have very thin leaky walls 4 of 18 Why do veins need valves? Keeps the blood flowing in one direction 5 of 18 Why do capillaries have very thin walls? Allows substances in the blood to pass around cells 6 of 18 The right ventricle pumps blood to the lungs The left ventricle pumps blood to the body 7 of 18 The aorta is the blood vessel taking blood out of the left ventricle The vena cava brings blood into the right atrium 8 of 18 The pulmonary artery takes blood from the right ventricle to the lungs The pulmonary vein takes blood from the lungs to the left atrium 9 of 18 The coronary arteries are located on the outside, they supply the heart muscle with oxygen and glucose h 10 of 18 Name three adaptations that make gas exchange be as efficient as possible 1) Large Surface 2) Thin membrane so gas can defuse across 3) Good blood supply for exchange of gases 11 of 18 Palisade mesophyll definition Main site of photosynthesis 12 of 18 Phloem definition Transport dissolved food from the leaves around the plant 13 of 18 Xylem definition Transports water and dissolved mineral ions 14 of 18 Epidermal definition Covers the surface of the leaf and provides protection 15 of 18 What is transpiration? The evaporation of water 16 of 18 Where does transpiration take place? In the stomata 17 of 18 What effects the rate of transpiration? (4 points) 1) Temperature 2) Humidity 3) Light intensity 4) Wind 18 of 18
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