Term
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Definition
| animals that eat only other animals |
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Term
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Definition
| animals that eat only plant material |
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Term
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Definition
| animals that eat both plant material and animals |
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Term
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Definition
| animals that trap and eat microscopic organisms that live in the water |
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Term
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Definition
| a flexible, tonguelike ribbon of tiny teeth |
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Term
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Definition
| the process that breaks down food into small molecules |
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Term
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Definition
| an organ system that has specialized structures for obtaining and digesting food |
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Term
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Definition
| an opening in the digestive tube through which wastes leave |
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Term
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Definition
| an organ where food is stored and softened |
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Term
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Definition
| a muscular organ where food is ground up |
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Term
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Definition
| an organ where digestion is completed and food is absorbed |
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Term
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Definition
| a tube that connects the mouth and stomach |
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Term
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Definition
| an organ where food is partially broken down before it enters the intestine |
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Term
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Definition
| the process in which cells use oxygen and digested food molecules to release the energy in food |
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Term
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Definition
| the process in which particles move from an area of high concentration to an area of low concentration |
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Term
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Definition
| the structures that an animal uses to exchange gases with its surroundings |
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Term
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Definition
| featherlike structures where gases are exchanged between water and blood |
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Term
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Definition
| saclike structures made up of a thin layer of cells where gases are exchanged between air and blood |
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Term
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Definition
| transports needed materials to cells and takes away wastes |
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Term
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Definition
| a hollow, muscular structure that pumps blood through vessels |
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Term
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Definition
| a system in which blood does not always travel inside vessels |
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Term
| closed circulatory system |
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Definition
| a system in which blood always stays inside vessels and the heart |
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Term
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Definition
| tiny, thin-walled blood vessels where the blood and body cells exchange substances |
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Term
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Definition
| a chamber that receives blood from the body |
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Term
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Definition
| a chamber that receives blood from an atrium and pumps it to the body |
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Term
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Definition
| the system that rids a body of nitrogen-containing wastes, and excess salt and water |
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Term
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Definition
| the main organs that filter nitrogen-containing wastes from the blood |
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Term
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Definition
| a water fluid produced by the kidneys that holds wastes |
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