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bugmenomore bugmenomore
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11 years ago
I have to answer this question for hw? please, can someone explain the embryonic layers? it confuses me, i don't know anything about embryology...
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wrote...
11 years ago
They only contain the ectoderm and endoderm. The ectoderm covers the cells on the outside of the animal and the endoderm lines the gastrovascular cavity.
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