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Food For Life

Science Key Words

TermDefinition
Absorbtion Digested food molecules are absorbed through the intestinal wall and carried by the bloodstream to be used in the cells of the body. Waste products and fibre remains in the digestive system.
Egestion Water is absorbed and then all undigested solids are pushed out as faeces (solid waste)
Heterotroph An organism deriving it's nutritional requirements from complex organic substances.
Enzymes A substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
Chloroplast A plastid in green plant cells which contains chlorophyll in which photosynthesis takes place.
Digestion The process of breaking down large molecules that can be absorbed into the circulatory system system for use throughout the body.
Photosythesis The process by which green plants and some other organism use sunlight to synthesize nutrients from carbon dioxide and water.
Palisade cells Their chloroplasts absorb a major portion of the light energy used by the leaf.
Lipids Any of a class of organic compounds that are fatty acids.
Oesophagus The part of the alimentary canal that connects the throat to the stomach.
Iodine Solution A food test to detect the presence of starch.
Biuret Test This is a food test to detect the presence of protien
Large Intestine The Colon and Rectum collectively.
Carbohydrates Can take the form of simple sugars eg. glucose or complex sugars such as starch.
Autotroph A plant that can make its own food through the process of photosynthesis.
Benedict Solution This is a food test for simple or single sugars like glucose.
Protein Is a compulsory part of our dietary components. It makes up most of our body tissue such as muscle and hair etc and also enzymes and anti bodies.
Ingestion The process of taking food, drink or another substance into the body by swallowing or absorbing it.
Created by: lucy1
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