单词	diploblastic
释义	diploblastic /ˌdɪplə(ʊ)ˈblastɪk / adjective Zoology Having a body derived from only two embryonic cell layers (ectoderm and endoderm, but no mesoderm), as in sponges and coelenterates.The transition from diploblastic to triploblastic body plans hinges on the origin of mesoderm.... The other diploblastic phylum, the Ctenophora, surprisingly, has not been reported to have septate junctions. The anthozoans are diploblastic animals developing from two epithelial germ cell layers: the ectoderm, facing the seawater, and the endoderm, facing the gastrovascular cavity or coelenteron.
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