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!
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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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