. The elements of experimental embryology. Embryology, Experimental; Embryology. Invag-inated Enter on micromeres \ plus micromeres oo oo o ooo. Exogastrula Fig. 47 Diagram illustrating the developmental potencies of isolated fragments of the sea-urchin embryo, representing different levels along the egg-axis. Note distri- bution from animal to vegetative pole of potencies for the formation of apical organ, ectoderm with cilia, and invaginated endoderm. The position of the third (equatorial) cleavage plane varies; when nearer to the animal pole, an isolated veg. i disc has more animal a
. The elements of experimental embryology. Embryology, Experimental; Embryology. Invag-inated Enter on micromeres \ plus micromeres oo oo o ooo. Exogastrula Fig. 47 Diagram illustrating the developmental potencies of isolated fragments of the sea-urchin embryo, representing different levels along the egg-axis. Note distri- bution from animal to vegetative pole of potencies for the formation of apical organ, ectoderm with cilia, and invaginated endoderm. The position of the third (equatorial) cleavage plane varies; when nearer to the animal pole, an isolated veg. i disc has more animal and less vegetative potencies, which it shows by forming an apical organ and not forming a gut; when the cleavage plane is nearer to the vegetative pole, an isolated veg. I disc invaginates a small gut and forms no apical organ. (Original, based on Horstadius.). 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 Huxley, Julian, 1887-1975; De Beer, Gavin, Sir, 1899-1972. New York [Hafner Pub. Co. ]
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Keywords: ., bookcentury1900, bookcollectionbiodiversi, booksubjectembryology
