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SLS Bio11 Animals SJ

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Term
Definition
asexual reproduction   Any form of reproduction that does not involve the combination of gametes (sex cells)  
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cell   The smallest unit of an organism with a nucleus  
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cephalization   Trend in evolution for the nervous system and the sensory organs to be positioned near the human or animal head  
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closed circulatory system   Have the blood closed at all times within vessels of different wall thickness and sizes. In this type of system, blood is pumped by a heart through vessels, and does not normally fill body cavities.  
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open circulatory system   Pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells. Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood.  
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coelom, colonial   A fluid-filled cavity within the body of an animal  
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endoskeleton   The internal structure of an organism  
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excretion   The act of discharging waste matter from the blood, tissues, or organs  
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exoskeleton   A hard supporting structure on the outside of the body  
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filter feeding   straining suspended matter and food particles from water  
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free-living   living independently of any other organism  
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internal transport   The act or means of moving molecules or ions across cell membrane or through the bloodstream  
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invertebrates   animals without a backbone.  
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life functions   different organ systems to carry on the activities required for life.  
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medusa   The freely-swimming, umbrella- or disk-shaped gelatinous form of Cnidarians  
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motility   capable of spontaneous motion  
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multicellular   Organisms consisting of many cells  
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niche   the way an organism fits into an ecosystem  
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organ   a part of the body that has a specific function  
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organ system   group of organs that work together to perform one or more functions  
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parasite/parasitic   An organism that lives and feeds on or in an organism of a different species and causes harm to its host  
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polyp   The hollow, columnar, sessile form of Cnidarians  
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reproduction   Creating a copy of something through asexual or sexual reproduction  
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respiration   The action of inhaling oxygen and exhaling carbon dioxide.  
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sessile   In a fixed place, unable to move  
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sexual reproduction   Creating offspring through sexual intercourse of the organisms  
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symmetry   balanced distribution of duplicate body parts within the body of an organism  
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tissue   an ensemble of similar cells from the same origin that together carry out a specific function  
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vertebral column   backbone of animals  
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