. Embryology. Embryology; Embryology; genealogy. 272 ,0 ESOPHAGUS P OLFACTORY PIT TELENCEPHALON =&. EMBRYOLOGY OTOCYST MESONEPHROS Fig. 178. The olfactory pits and their relation to the cerebral hemispheres of the telencephalon. Fig. 179. The eye and metanephros 6-mm. pig embryo. otocyst, of the i MYELENCEPHALON INTERNAL EAR VISCERAL GROOVE 1 1 5 VISCERAL ARCH PHARYNX VISCERAL POUCH kJ The internal ear on of a 10-mm. Fig. 180. ' in a cross secti pig embryo. Fig. visceral grooves 181. The pouches, ar of the pig e pharynx, id visceral mbryo. the similarity to Figure 97, a diagram of the five
. Embryology. Embryology; Embryology; genealogy. 272 ,0 ESOPHAGUS P OLFACTORY PIT TELENCEPHALON =&. EMBRYOLOGY OTOCYST MESONEPHROS Fig. 178. The olfactory pits and their relation to the cerebral hemispheres of the telencephalon. Fig. 179. The eye and metanephros 6-mm. pig embryo. otocyst, of the i MYELENCEPHALON INTERNAL EAR VISCERAL GROOVE 1 1 5 VISCERAL ARCH PHARYNX VISCERAL POUCH kJ The internal ear on of a 10-mm. Fig. 180. ' in a cross secti pig embryo. Fig. visceral grooves 181. The pouches, ar of the pig e pharynx, id visceral mbryo. the similarity to Figure 97, a diagram of the five primary divisions of the chick brain. The sense organs, such as the nasal pits, follow the same pattern of development as in lower vertebrates. Figure 178 shows the invagination of the ectoderm to form the olfactory pit. The neuroblasts in the lining of this pit grow into the telencephalon and form the first cranial nerve. Figures 179 and 180 are photographs through the eye and ear region of the pig embryo. The development of these structures is very similar to the develop- ment of the eye and ear in the chick embryo (Chap. 11). During the de velopment of the digestive system we find a striking similarity in the pharyn-. 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 Barth, Lester G. (Lester George), 1905-1979. New York, Dryden Press
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