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470Celegansterms - C elegans Terms Triploblastic"three...

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C. elegans Terms Triploblastic – “three layer” animals containing tissues derived from the three germ layers, ectoderm, mesoderm, and endoderm, as opposed to diploblastic animals that lack mesoderm tissue ectoderm – “outside”; cells that remain on the outside surface of the embryo following gastrulation - forms the nervous system from the neural tube and neural crest -generates epidermis covering the embryo mesoderm – “between”; the middle of the three embryonic germ layers, lying between the ectoderm and the endoderm -gives rise to muscles and skeleton, connective tissue, reproductive organs, kidneys, blood, cardiovascular tissue endoderm,- “within”; innermost germ layer -forms the epithelial lining of the respiratory tract, the GI tract, and the accessory organs of the digestive tract gastrulation – process involving movement of the blastomeres of the embryo relative to one another resulting in the formation of the three germ layers of the embryo
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