| Term 
 | Definition 
 
        | an organism having both male and female organs. |  | 
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        | Term 
 | Definition 
 
        | when fission occurs, the two animals that result are called this. |  | 
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        | Term 
 | Definition 
 
        | asexual reproduction in flatworms. |  | 
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        | Term 
 | Definition 
 
        | what are the functions of protonephridia and flame cells? |  | 
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        | Term 
 | Definition 
 
        | What is the function of "eyespots"? |  | 
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        | Term 
 | Definition 
 
        | any organism that lacks a cavity between the body wall and digestive tract. |  | 
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        | Term 
 
        | What is the function of parenchyma tissue? |  | Definition 
 
        | spongy connective tissue, space filler, sometimes provides support, nutrient storage, etc. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | formation of a distinct head.  occurs at the anterior end of the organism. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | having three primary cell layers: endoderm, mesoderm, ectoderm |  | 
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        | Term 
 | Definition 
 
        | most species of flatworms have this type of life cycle. |  | 
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        | Term 
 | Definition 
 
        | what is found on the side of a flatworm's head that is chemosensory. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | what is missing in a flatworms incomplete gut. |  | 
        |  | 
        
        | Term 
 
        | Name the 4 classes of phylum platyhelminthes. |  | Definition 
 
        | turbellaria, monogenea, trematoda, cestoidea |  | 
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        | Term 
 | Definition 
 | 
        |  | 
        
        | Term 
 | Definition 
 
        | what organ system is missing in tapeworms? |  | 
        |  | 
        
        | Term 
 
        | Moneocious/Hermaphrodites |  | Definition 
 
        | containing both male and female sex organs. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | the type of symmetry flatworms have. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | the light sensitive structures on a planarian. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | flame cells are part of which body system? |  | 
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        | Term 
 | Definition 
 
        | rodlike cells that swell and form a protective mucous sheath around the body. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | the most advanced turbellaria feed by extending this. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | these flatworm parasites always have a mollusc, usually a snail, as part of their life cycle. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | networks of fine tubules that run the length of the turbellarian, along each of its sides. |  | 
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        | Term 
 | Definition 
 
        | cells that contain numerous cilia that are used to rid the organism of wastes |  | 
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        | Term 
 | Definition 
 
        | digestive system that lacks an anus |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | The special name for the protective bodycovering of parasitic flatworms |  | 
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        | Term 
 | Definition 
 
        | The common name for the phylum Platyhelminthes |  | 
        |  | 
        
        | Term 
 | Definition 
 | 
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        | Term 
 | Definition 
 | 
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        | Term 
 | Definition 
 
        | having both a right and left side |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | movement from a high concentration to a low concentration, no energy needed |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | tapeworms belong specifically in this class |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | glands that release a chemical that dissolves the organism's attachment |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | glands that produce a chemical that attaches to a substrate |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | when digestion occurs outside the cell, inside a digestive cavity |  | 
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