Dialysis - purification of blood, Anemia - lack of haemoglobin, Double circulation - blood enters the heart twice for one complete circulation, Saliva - contains lysozyme, Intercostal muscle - attached to ribs, Ultrafiltration - glomerulus, Valves - Check backflow of blood, Collecting duct - water absorption, Pulmonary vein - brings oxygenated blood to heart, Pulmonary artery - carries deoxygenated blood to lungs,

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