Examlex
Which of these abbreviations stands for the most common radiologic procedure?
Nematode
Unsegmented worms of the phylum Nematoda, including both parasitic and free-living species that can be found in various environments.
Ectoderm
The outer germ layer of the early embryo; gives rise to the skin and nervous system. Compare with mesoderm and endoderm.
Protostomes
Animals that belong to the Protostomia, one of the major animal clades. Include the annelids, arthropods, and mollusks. Compare with deuterostomes.
Deuterostomes
A major group of animals characterized by their embryonic development, in which the anus forms before the mouth.
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