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Definition
| animal lacking a coelom, or body cavity |
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Definition
| fluid-filled body cavity lined with mesoderm |
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Definition
| muscular tube at the end of the gastrovascular cavity, or throat, that connects the mouth with the rest of the digestive tract and serves as a passageway for air and food |
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Definition
| specialized cell that filters and removes excess water from the body of a flatworm |
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Definition
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Term
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Definition
| group of cells that can detect changes in the amount of light in the environment |
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Definition
| individual that has both male and female reproductive organs |
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Term
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Definition
| form of asexual reproduction in which an organism splits in two, and each half grows new parts to become a complete organism |
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Definition
| head of an adult tapeworm; can contain suckers or hooks |
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Term
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Definition
| one of the segments that make up most of a tapeworm’s body |
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Definition
| male gonad that produces sperm |
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Definition
| body cavity between the endoderm and mesoderm tissues that is partially lined with mesoderm tissue |
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Definition
| opening through which wastes leave the digestive tract |
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Term
| closed circulatory system |
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Definition
| system in which blood is contained within a network of blood vessels |
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Term
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Definition
| paddlelike appendages used for swimming and crawling |
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Definition
| bristles attached to the segments of many annelids |
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Definition
| tongue-shaped structure used for feeding by snails and slugs |
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Term
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Definition
| tubelike structure through which water enters and leaves a mollusk’s body |
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Definition
| system in which blood is not always contained within a network of blood vessels |
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Term
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Definition
| drawing water into mantle cavity and then forcing water out through a siphon, propelling the mollusk in the opposite direction |
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Term
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Definition
| muscular part of a mollusk, used for crawling, burrowing, capturing prey |
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Term
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Definition
| thin layer of tissue that covers most of a mollusk’s body |
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Definition
| structure in mollusks made by glands in the mantle that secrete calcium carbonate |
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Term
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Definition
| area beneath the mantle of a mollusk that contains the internal organs |
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