Inhalation, Diaphragm contracts and chest volume increases, Exhalation, Diaphragm relaxes and chest volume decreases, Gas exchange, Oxygen enters blood while carbon dioxide leaves blood, Aerobic respiration, Chemical reactions that release energy from glucose, Phagocytosis, A white blood cell surrounds and destroys a pathogen, Blood clotting, Platelets help seal a damaged blood vessel, Oxygen transport, Oxygen is carried from lungs to body tissues, Carbon dioxide removal, Carbon dioxide moves from blood into alveoli and is exhaled, Circulation, Blood transports substances throughout the body, Antagonistic muscle action, One muscle contracts while the opposing muscle relaxes, Oxygenation of blood, Blood gains oxygen at the lungs, Deoxygenation of blood, Blood loses oxygen as it supplies body cells, Red blood cell count becomes very low, Less oxygen can be transported to body cells, Platelet count becomes very low, Bleeding may continue for longer, White blood cell count becomes very low, The body becomes less effective at fighting pathogens, Alveoli are badly damaged, Less efficient gas exchange occurs, Diaphragm cannot contract properly, Inhalation becomes more difficult, Heart pumps blood less effectively, Oxygen delivery to tissues decreases, A blood vessel becomes blocked, Less blood reaches tissues beyond the blockage, Carbon dioxide cannot diffuse into alveoli, Carbon dioxide removal from the body decreases, Blood does not reach the lungs effectively, Gas exchange cannot properly oxygenate that blood, Muscles exercise more intensely, Demand for oxygen and glucose increases, Breathing rate increases during exercise, More oxygen can be taken in and more carbon dioxide removed, Capillary exchange is reduced, Delivery of nutrients and removal of wastes are affected, I carry blood away from the heart, not necessarily always oxygenated blood., Artery, I carry blood towards the heart, not necessarily always deoxygenated blood., Vein, I am very small and allow materials to move between blood and tissues., Capillary, I contain haemoglobin and have an important role in oxygen transport., Red blood cell, I can engulf microorganisms., White blood cell, I am not a cell, but I am important in blood clotting., Platelet

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