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Life Functions

Words/Descriptions

Life functionsDescription
Nutrition All activities involved in obtaining and processing food for energy.
Digestion Part of Nutrition: Breaking down of complex substaces into simple substances
Egestion Part of Nutrition:Removal of undigestible wastes.
Transport The process by which substances move into or out of cells or are distrubuted within cells.
Absorption Type of Transport: The movement of a substance, such as a liquid or solute, across a cell membrane by means of diffusion or osmosis.
Circulation Type of transport: Distribution of the materials thoughout the organism.
Respiration The release of stored energy from food (glucose). Aerobic = Uses oxygen to release stored energy from food. Anaerobic = Does not use oxygen but as a result yields less stored energy.
Excretion Removal from the organism of waste substances producted by the cells during metabolic activities.
Growth Increase in size or number of cells.
Synthesis Opposite of digestion. "Building up or making more complex substances from simpler ones"
Reproduction Production of new indivduals. Not nessacary for life of an individual but for the continuation of a new species.
Regulation Control and cordination of all the various life activities.
Ingestion Part of Nutrition: Taking in of food.
Metabolism The sum of all the life functions.
Homeostasis A balanced, stable internal environment.
Created by: Misscusenza
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