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13 Cards in this Set
- Front
- Back
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Name the two types of Symmetry
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Radial - Can make multiple mirror images (Sponge)
Bilateral - Dorsal Ventral Axis (Lobster) |
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Tissue Layers?
Animals with a muscle tissue layer are... |
Triploblastic - Mesoderm, Endoderm, Ectoderm
Dipoblastic - Ectoderm and Mesoderm Animals are tripoblastic |
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Body Cavities
What does the mesoderm determine? |
Are only found in tripoblastic animals
Coelom - Allows for the movement from the outside to not affect the inside. Mesoderm determines in you have a body cavity - coelem |
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Describe an Acoelomate
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Lacks a body Cavity, one internal space which is a digestive cavity
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Platyhelminthes are...
What is a lophophore |
Flatworms with a gastrovascular cavity.
Lack Lophophore. Lophophore is a horshoe shaped suspension feeding organ |
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Bilateria all have
Turbellarian have |
Bilateral Symmetry and triploblastic development
Light sensitive eyespots and centralized nerve nets |
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What is difference btw Protosome and Deuterosomes?
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Blastopore is the first opening to become mouth then followed by anus
Deuterosomes - Anus to mouth |
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Brachiopods
Annelida |
Have Lophophore - Shells are dorsal and ventral -
Segmented Worms, made of series of fused rings Triploblastic Coelomates |
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Mollusca
Which is not a molluscs a)Octopus b)Brachiopod c)Snail |
Snails, Clams and Cephalopods
Softbodied animals sometimes protected by a hard shell. Body consists of muscular foot, visceral mass and a mantle. Brachiopod is not a mollusc Include: Chitons, Gastropods, Bivalves, Cephalopods |
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Nematoda -
They are part of Ecdysozoans, what does this tell us? |
These are roundworms
Nonsegmented pseudocoelomates. Tough cuticle surrounds them made of chitin (Exoskeleton) - Process of Ecdysis in which they molt. |
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Echinoderms -
Where are these Bilateral? What stage? |
They have radial anatomy developed from bilateral symmetry of ancestors.
They are deuterosomes that are bilateral in their larval stage. |
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Arthropoda
They have two special features? Why can't they get bigger? |
Segmented Coelomates with exoskeleton and jointed appendages
Their appendages have gone through evolution for - Open circulatory system and gas exchange Invertebrates are limited in size due to exoskeleton and circulation system (Pipe is not as strong if it gets bigger thing) |
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Chordates
Urochordates are lacking what? |
Share many features of embryonic development with echinoderms. They have muscular post anal tail. Vertebrata is a sub phylum. They have dorsal nerve cord, and muscular post anal tail. NOTOCHORD distinguishes it, and gills and slits in pharynx
Humans belong to the phylum chordata and therefore are deuterostomes. They lack a vertebrae |
