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Key words

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
        Help!  

Term
Definition
Carbohydrate   A nutrient used for energy made up of carbon, hydrogen, and oxygen  
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Constipation   When the intestines get blocked  
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Diet   The food that you eat  
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Fibre   A substance not absorbed in the body needed for peristalsis  
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Peristalsis   Movement of material through the intestine  
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Lipid   Fats (solids) and oils (liquids)  
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Mineral (biology)   An element that is a nutrient needed in small quantities for health  
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Mineral (chemistry)   A naturally occurring element or compound that can form distinct grains in rocks  
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Nutrient   A substance needed in the diet to provide the raw materials for making new substances and for energy release  
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Nutrition   The substances that help organisms respire and grow  
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Oil   A liquid fat  
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Protein   A nutrient used for growth and repair  
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Raw material   A substance used to make other substances  
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Starch   A type of insoluble carbohydrate found in plants (complex carbohydrate)  
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Sugar   A type of soluble carbohydrate (simple carbohydrate)  
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Vitamin   A nutrient needed in small quantities for health  
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Fuel   A substance that is a store of energy that can be easily transferred (often chemical or nuclear)  
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Kilojoule   1kJ is 1000J  
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Joule   A unit for measuring energy (J)  
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Respiration   A process of releasing energy to do work Glucose + oxygen --> energy + carbon dioxide + water  
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Anaemia   A deficiency disease caused by the lack of iron  
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Balanced diet   Eating a wide variety of foods to provide all the things the body needs  
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Deficiency disease   A disease caused by a lack of a nutrient  
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Heart disease   A disease caused by narrowing of the coronary artery causing heart muscle to die  
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Kwashiorkor   A deficiency disease caused by a lack of protein  
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Malnutrition   A problem caused by having too much or too little of a nutrient in the diet  
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Night blindness   A deficiency disease caused by a lack of vitamin A  
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Obesity   Being very overweight  
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Reference Intake (RI)   The amount of a nutrient that people are advised to eat in a day  
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Rickets   A deficiency disease caused by lack of calcium or vitamin D  
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Scurvy   A deficiency disease caused by lack of vitamin C  
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Starvation   A form of malnutrition in which people lack one or more nutrients  
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Absorb   To soak up or take in  
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Anus   The opening at the end of the gut  
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Bacteria   A single celled microorganism with the DNA not in a nucleus (prokaryote)  
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Catalyst   A substance that speeds up a chemical reaction without itself being used up  
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Digestion   A process that breaks food into soluble substances in our bodies  
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Digestive juice   A liquid containing enzymes that break down food  
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Digestive system   An organ system that breaks down food  
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Egestion   When faeces are pushed out of the anus  
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Elimination   See Egestion  
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Enzyme   An organic catalyst  
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Faeces   Waste food material produced by the intestines  
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Food pipe   See oesophagus  
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Gullet   See oesophagus  
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Oesophagus   The muscular tube from the mouth to the stomach  
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Gut   The organs that form the tube from the mouth to the anus  
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Ingestion   Taking substances into the body  
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Insoluble   Cannot be dissolved in a certain liquid  
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Large intestine   An organ that removes water from undigested food  
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Liver   An organ used to make, destroy and store substances in your body  
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Microorganism   An organism too small to be seen with the naked eye  
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Rectum   An organ that stores faeces before they are egested  
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Saliva   A digestive juice that contains an enzyme that breaks down starch into sugar  
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Salivary gland   Gland in mouth that makes saliva  
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Small intestine   An organ where most digestion occurs - molecules are made small enough to pass into the blood  
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Soluble   Can dissolve in a certain liquid  
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Stomach   An organ containing HCl which also mixes up food and digests proteins  
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Diffusion   When particles spread from high concentration to low concentration  
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Microvillus   A fold on the surface of a villus cell to increase surface area  
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Plasma   The liquid part of the blood  
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Villus   A small finger-like part of the small intestine to increase surface area  
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