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| building blocks of proteins. |
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| the body's main energy source-sugars, starch, and fiber-formed of carbon, hydrogen, and oxygen atoms; found in fruit, pasta, and whole-grain cereals and breads. |
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| digestive system process that occurs when chemicals break down large food molecules into smaller ones that can be absorbed by the body. |
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| thin, watery product of digestion that moves slowly out of the stomach and into the small intestine. |
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| chemical and mechanical process that breaks food down into small molecules so that they can be absorbed by the body. |
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| a type of protein that speeds up the rate of chemical reactions in the body but is not used up or changed itself in anyway during the reaction. |
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| nutrient that provides energy and helps the body absorb vitamins; can be saturated or unsaturated. |
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| one of five groups of foods that contain the same nutrients: breads and cereals, vegetables, fruit, milk, and meat. |
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| digestive system process where food is broken down through chewing, mixing, and churning. |
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| inorganic nutrient that regulates many of the body's chemical reations; bulids cells, sends nerve impulses, and carries oxygen. |
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| substances in food-proteins, carbohydrates, fats, vitamins, minerals, and water-that the body uses for cell development, repair, and growth and that provides energy. |
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| waves of muscular contractions that move food through the digestive system. |
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| nutrient made up of amino acids that is used for replacement and repair of body cells and has large molecules that contain carbon, hydrogen, oxygen, and nitrogen; found in meats, fish, and beans. |
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| fingerlike projections in the wall of the small intestine that increase the surface area for absorption of nutrient molecules. |
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| organic, water-soluble or fatsoluble nutrient needed in small quantities for growth, regulating body functions and preventing disease. |
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