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Endoderm: One of the three primary germ cell layers -- the other two are the mesoderm and ectoderm -- in the very early embryo. The endoderm is the innermost of the three layers. It differentiates to give rise first to the embryonic gut and then to the linings of respiratory and digestive tracts and the liver and pancreas.
also en·to·derm ( ĕn ' tə- ) n. The innermost of the three primary germ layers of an animal embryo, developing into the gastrointestinal tract, the lungs, and ...
endoderm (embryo), the innermost of the three germ layers, or masses of cells (lying within ectoderm and mesoderm), which appears early in the development of an animal ...
The function of the embryonic endoderm is to construct the linings of two tubes within the body. The first tube, extending throughout the length of the body, is the ...
endoderm /en·do·derm/ (en´do-derm) the innermost of the three primitive germ layers of the embryo; from it are derived the epithelium of the pharynx, respiratory ...
noun 1. Also called endoblast. Embryology . the innermost cell layer of the embryo in its gastrula stage. 2. Anatomy . the innermost body tissue that derives from ...