tissue - collection of specialised cells working together, organ - collection of tissues working together, enzyme - biological catalyst made of protein, lipids - fats - made of glycerol and fatty acids, proteins - made of amino acids, needed for growth, amylase - carbohydrase enzyme that works on the substrate starch, denatured - when the active site of an enzyme no longer fits the substrate, metabolism - sum of all the reactions in the cell or body, bile - alkaline substance that can emulsify lipids, arteries - blood vessel that takes blood away from the heart, veins - blood vessel that takes blood to the heart, capillaries - smallest blood vessel, adapted to allow substances to diffuse into and out of it, valves - prevent back flow of blood in the heart and veins, pacemaker - controls the heart beat and found in the right atrium, aorta - carries oxygenated blood from the heart, vena cava - carries deoxygenated blood to the heart, stent - wire mesh that widens blocked blood vessels, alveoli - air sac, translocation - movement of sugars in the phloem, transpiration - movement of water and ions up a plant through the xylem, guard cells - control the size of the stomata, potometer - equipment used to measure the rate of evaporation from a plant cutting,

Organisation Glossary

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