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26 Cards in this Set
- Front
- Back
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Symmetry
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Arrangement of body parts in relation to the central axis
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Radial
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Animal may be divided into any number of equalhalves only along the centrallongitudinal axis
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Bilateral
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Body parts usually in pairs on either side of the sagittal axis
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Acoelomate
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No body cavity Filled with jelly like substance Ex: Flat Worms |
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Pseudocoelomate
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False body cavity Have a body cavity but not lined with a membrane Ex: Round worms |
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Eucoelomate
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True body cavity Lined with a membrane |
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Segmentation
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Bodies divided into different segments
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Phylum Porifera
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Sponges Simplest of all animals |
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Spicules
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Skeletal elements of the sponge Made of calcium or silica |
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Cnidaria
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Jellyfish, Coral and relatives Means "stinging cells" |
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Polyp
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Body Type of Cnidaria Ex: Sea Anemone |
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Medusa
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Body type of Cnidaria Umbrella shaped Ex: Jellyfish |
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Physalia sp.
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Portuguese Man 'O' War
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Platyhelminthes
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Flat worms Have a incomplete digestive system, if present |
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3 types of flat worms
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-Free-living -Trematodes -Tapeworms |
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Which type are parasitic and cause the human disease Schistosomiasis? |
Trematodes
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Phylum Nematoda
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Round worms
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Hydrostatic skeleton
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Found on pseudocoelomates
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Ascaris
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A nematode parasite of humans
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Phylum Mollusca
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Clams, snails, squid Have shells of calcium carbonate (CaCO3) |
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Phylum Annelida
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"Segmented Worms" Closed circulatory system |
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Phylum Anthropoda
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Means Jointed Appendage Have exoskeleton made of chitin |
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Crustaceans
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Shrimp, Lobster, Crayfish
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Echinodermata
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Means "spiny skin" Ex: Starfish, Sea Urchins, etc. |
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Phylum Chordata
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Mostly Vertebrates - Animals w/ backbones Dorsal, hollow nerve cord Pharyngeal gill slits |
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Type of Invertebrate Chordates: Many of which are often colonial? |
Tunicates
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