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Ectoderm - Wikipedia, the free encyclopedia
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Online Medical Dictionary and glossary with medical definitions ... Ectoderm: One of the three primary germ cell layers (the other two being the mesoderm and endoderm) that make up the very early embryo. The ectoderm is the outermost of the three layers.
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Germ layer - Wikipedia, the free encyclopedia
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Mesoderm - Wikipedia, the free encyclopedia
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Britannica online encyclopedia article on ectoderm (anatomy), the outermost of the three germ layers, or masses of cells, which appears early in the development of an animal embryo. In vertebrates, ectoderm subsequently gives rise to hair, skin, nails or hooves, and the lens of the eye; ... CREATE MY ectoderm NEW DOCUMENT...
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Get information, facts, and pictures about ectoderm at Encyclopedia.com. Make research projects and school reports about ectoderm easy with credible articles from our FREE, online encyclopedia and dictionary. ... ectoderm layer of cells that covers the surface of an animal embryo after the process of gastrulation has occurred.
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Definition of ectoderm from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... Learn more about "ectoderm" and related topics at Britannica.com...
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They are the Ectoderm (shown in the diagram as blue), Mesoderm (red) and Endoderm (yellow). Following gastrulation, various cell lineages are derrived from these three primary cell types. For example, the Ectoderm gives rise to the epidermis and its derrivatives such as nails, hair and teeth.
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In higher animals, such as those of the phyla Echinodermata and Chordata, a third, middle layer, the mesoderm, is formed between the ectoderm and endoderm during gastrulation, and the process is termed triploblastic development.
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; One of three so-called germ layers of tissue formed in the early development of a fertilized ovum (egg). It is the outer layer of the blastula and later differentiates, in most animals, into a skin or shell, a nervous system, lining tissue, Other germ layers are the endoderm and mesoderm. ... entire Web this site ;
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