GCE O Level Biology: Definitions of Keywords from Nutrition in Humans, Respiration and Excretion

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Terms in this set (17)
Gaseous exchangeExchange of gases between an organism and the environmentInhalation / inspirationTaking in of airExhalation / expirationGiving out of airCancerAn uncontrolled division of cells producing outgrowths or lumps of tissuesExcretionProcess by which metabolic waste products and toxic materials are removed from the body of an organismUltrafiltrationProcess in which hydrostatic pressure causes water and small dissolved substances and ions to move across the capillary wall into the nephron tubuleOsmoregulationControl of water and solute levels in the blood to maintain a constant water potential in the body