. Analysis of development. Embryology; Embryology. Teleosts and Birds 305 a ventral half-blastula deeply stained with neutral red, the resulting embryo arises from the ventral pole, , in reversed orien- tation. However, if a stained ventral trans- plant replaces the host ventral half, an unstained axis arises from the dorsal pole in the original direction. Thus staining seems dulus, according to Oppenheimer, no grafts of lateral or ventral germ ring in gastrula stages have been found to form axial tissues unless implanted directly into the embryonic shield, where inducing power is already


. Analysis of development. Embryology; Embryology. Teleosts and Birds 305 a ventral half-blastula deeply stained with neutral red, the resulting embryo arises from the ventral pole, , in reversed orien- tation. However, if a stained ventral trans- plant replaces the host ventral half, an unstained axis arises from the dorsal pole in the original direction. Thus staining seems dulus, according to Oppenheimer, no grafts of lateral or ventral germ ring in gastrula stages have been found to form axial tissues unless implanted directly into the embryonic shield, where inducing power is already known to exist. Thus in both forms, com- petence to form nervous system exists all. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Willier, Benjamin H. (Benjamin Harrison), b. 1890. Philadelphia, Saunders


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Keywords: ., bookcentury1900, bookpublisherphiladelphi, booksubjectembryology