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8 Cards in this Set
- Front
- Back
Describe the anatomy of planaria.
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-Eyespots to detect light-ocelli
-can regenerate -flame cells for excretion -ganglia (nervous net) -pharynx -digestive system |
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Why are ribbonworms described as a transitional group between flatworms and roundworms?
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flatworms -> no body cavity
Ribbonworms ->false body cavity (acoelomate)Roundworms -> pseudocoelmate (body cavity) |
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What are the similarities between flatworms and roundworms?
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flatworms have no body cavity, one way gut and are hermaphrodites.
Roundworms have body cavity complete gut, seperate sexes. |
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All animals other than sponges. Have tissue and symmetry.
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eumatazoans
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Develop a definite head region where nervous tissue is bunched up.
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cephalization
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False body cavity
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Acoelomate
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lined both on inside of body wall & around the gut by mesderm
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Coelomate
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body cavity located between endoderm and mesoderm
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pseudocoelom
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