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22 Cards in this Set
- Front
- Back
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organ that forms from the ectoderm
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skin
mesoderm - muscle endoderm- digestive system |
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this animal pair shares the most characteristics
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earthworm-clam
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all animals must search for food because they are
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heterotrophic
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an ________ is an example of an animal that is sessile as an adult
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coral
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this is NOT a characteristic of animals
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cells with cell wall
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when mesoderm cells begin to form from the endoderm
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after the gastrula stage
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this animal is an example of an animal with radial symmetry
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hydra
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fishes have one fin along their back, because fished are ______ symmetrical this fin is called the ___ fin
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bilaterally dorsal
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which animal obtains food by filtering it out of water
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has to be aquatic
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of these which is NOT an example of a vertebrate animal
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garden spider
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acoelomate
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animals having 3 cells layers- but no body cavities
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coelom
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the body cavity of an earthworm develop
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blastula
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hollow balls of cells - surrounded fluid filled space
(blastula seal) |
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endoderm
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cells lining the inner surface
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radial symmetry
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divided along any plane through a central axis, into roughly equal halves
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sessile
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cannot move
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psedodocoelomate
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fluid filled with body cavity partly lined with mesoderm
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deuterostrome
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mouth develops from cells elsewhere on the blastula
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bilateral symmetry
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divided left and right - mirror images
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ectoderm
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outer surface of the gastrula
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gastrula
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two layers of cells with an opening at one end
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mesoderm
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3rd layer formed in embryo
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