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| inorganic substances that are involved in many of the body's chemical reactions. Your body has to have them to maintain good health and fight disease. |
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| compounds that contain carbon; they make up living things. |
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| smallest functional unit in an organism. Every living thing is made up of one or more cells. |
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| groups of similar cells that do the same sort of work (nerve tissues, blood tissues, etc.) |
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| a structure made up of different types of tissues that work together. (heart) |
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| a group of organs that work together to do a certain job (digestive, urinary, reproductive, etc.) |
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| breakdown of foods into smaller molecures to be used by the cells in the body |
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| a protein that helps the body carry out chemical reactions |
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| tiny fingerlike projections in the intestine that absorb food molecules |
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| the passing of food cells through the villi and into the bloodstream |
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| chemical processes in which oxygen combines with food molecules and energy is released |
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| clusters of tiny sacs in the lungs |
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| removal of waste products |
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| the process by which the body maintains a stable internal environment (temperature) |
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| the body changes an internal condition back to its normal state (overheating, exercising) |
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| a change from a normal state to an even greater change (childbirth contractions, blood clotting) |
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| the main source of energy for living things |
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| large complex organic compounds that store information in the form of a code: DNA, RNA |
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| assist in making structural parts of the body such as hair, nails, skin, muscles, and blood vessels |
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| help the body grow, repair, digest, transmit nerve impulses, and aid in cellular respiration |
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| fats and oils, stored in the body as energy reserves |
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