Chapter 18 Definitions - forms the skin of the gastrula and...

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Ingestion: The act of eating; the first main stage of food processing. Blastula (blas′-tyu-luh): An embryonic stage that marks the end of cleavage during animal development; a hollow ball of cells in many species. gastrula (gas′-tru-luh): The embryonic stage resulting from gastrulation in animal development. Most animals have a gastrula made up of three layers of cells: ectoderm, endoderm, and mesoderm. endoderm (en′-do-derm): The innermost of three embryonic cell layers in a gastrula; forms the archenteron in the gastrula and gives rise to the innermost linings of the digestive tract and other hollow organs in the adult. ectoderm (ek′-to-derm): The outer layer of three embryonic cell layers in a gastrula;
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Unformatted text preview: forms the skin of the gastrula and gives rise to the epidermis and nervous system in the adult. mesoderm (mez-o-derm): The middle layer of the three embryonic cell layers in a gastrula; gives rise to muscles, bones, the dermis of the skin, and most other organs in the adult. larva (lar-vuh): (plural, larvae) A free-living, sexually immature form in some animal life cycles that may differ from the adult in morphology, nutrition, and habitat. metamorphosis (met-uh-mor-fuh-sis): The transformation of a larva into an adult. Invertebrate: An animal that lacks a backbone....
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This note was uploaded on 09/12/2008 for the course BIO G 109 taught by Professor Winkler,d. during the Fall '06 term at Cornell University (Engineering School).

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