. The science and practice of dental surgery. Trophobla&t. Amnioticectoderm. -j^— Ectomesoderm, -lA Embryonic entoderm. Primarymesoderm. Amnion cavity. Primitivealimentary canalExtra-embryoniccoelom. D. plasmodial trophoblast. Cellular ectoderm. Embryonicectomesoderm Embryonic entoderm. Extra-embryonicentoderm. Primary mesoderm. Plasmodial trophoblast. Cellular trophoblast. Amniotic ectoderm. ;inbryonic entoderm .Extra-embryonicentoderm. Primary mesoderm. Fig. 3.—Differentiation of the morula and theformation of the amnion,
. The science and practice of dental surgery. Trophobla&t. Amnioticectoderm. -j^— Ectomesoderm, -lA Embryonic entoderm. Primarymesoderm. Amnion cavity. Primitivealimentary canalExtra-embryoniccoelom. D. plasmodial trophoblast. Cellular ectoderm. Embryonicectomesoderm Embryonic entoderm. Extra-embryonicentoderm. Primary mesoderm. Plasmodial trophoblast. Cellular trophoblast. Amniotic ectoderm. ;inbryonic entoderm .Extra-embryonicentoderm. Primary mesoderm. Fig. 3.—Differentiation of the morula and theformation of the amnion, yolk, and coelomiccavities (after Cunningham). A, Showing outer layer of cells (trophoblast), and inner mass of cells, which have now separ-ated into three groups, viz. ectoderm, ento-derm, and primary mesoderm. The darker shaded cells of the inner mass are those i^ - - from which the embryo will be some mammals a cavity (segmentationcavity) replaces the space occupied by the cells of the primary mesoderm. B, Showing further differentiation of the cells of the inner mass. The primary mesoderm has proliferated still further, and now separates the cells of the inner mass from the outer layer of cells (trophobla
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdentistry, bookyear19
