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12 Cards in this Set
- Front
- Back
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describe acoelous
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-no coelom/body cavity
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describe pseudocoelom
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-has a coelom but it is not lined with mesoglia and the mesoderm does not line the whole thing
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describe coelom
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lined with mesoglia and completely with mesoderm
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what does a coelom allow for?
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a tube within a tube, and organs
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describe a tube within a tube
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-outside tube is the ectoderm and mesoderm
-inner tube is mesoderm and endoderm |
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name types of acolemates (2)
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platyheliminths(flat worms)
acoelomorpha |
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name types of pseudocoelom
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nematoda(round worms)
rotifers |
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name types of coelomates
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annelida(segmented worms)
mollusca(clams,snails,octopus) arthropods(anything with a joint leg spiders, crabs) echinodermata(starfish,sea urchins) chordata(sharks,mammals,frogs) |
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what are the differences of development in protostomes and deuterostomes?
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cleavage,gastrulation,coelom formation
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what kind of cleavge does the protstome make?the deuterostome?
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-spiral(at an angle)
-radial(perfectly stacked) |
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what forms first in the protostomes? in the deuterostomes?
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-mouth
-anus |
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how does the coelom form in the protostome? in the deuterostome?
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-from the mesoderm
-pinches off |
