id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
45019	Balfour, Francis M. (Francis Maitland)	The Works of Francis Maitland Balfour, Volume 3 (of 4) A Treatise on Comparative Embryology: Vertebrata			.txt	text/plain	294990	25998	71	consists of a dorsal section formed of distinct cells, and a ventral It forms a tube of which the open front end eventually develops into is formed of cells continuous with the epiblast of the embryo; while cells passing in from the yolk to form the ventral wall of the are formed by a differentiation of the primitive lower layer cells. segmentation cavity is formed of epiblast cells only. The anterior end remains open to the body cavity, and forms a prominent, forming of itself the anterior end of the body (fig. arises from the small cells forming the roof of the segmentation-cavity. hypoblast-cells to form the ventral wall of the anterior region of the of the mesoblast cells to form the Wolffian body; _ep._ epiblast; dorsal side, its ventral wall being formed of yolk-cells (fig. are developed from the cells forming the walls of the primitive	./cache/45019.txt	./txt/45019.txt