. The elements of embryology . Embryology. 124 THE THIRD DAY. [ AOA Section through the Hind-Brain op a Chick at the end OF THE Third Day of Incdbation. IV. Fourth ventricle. The section shews the very thin roof and thicker sides of the ventricle. Ch. Notochord—(diagrammatic shading). CV. Anterior cardinal or jugular vein. CG. Involuted auditory vesicle. CO points to the end which win form the cochlear canal. RL. Recessus labyrinthi. Ay. hypoblast lining the alimentary canal. Ay is itself placed in the cavity of the alimentary canal, in that part of the canal which will become the throat
. The elements of embryology . Embryology. 124 THE THIRD DAY. [ AOA Section through the Hind-Brain op a Chick at the end OF THE Third Day of Incdbation. IV. Fourth ventricle. The section shews the very thin roof and thicker sides of the ventricle. Ch. Notochord—(diagrammatic shading). CV. Anterior cardinal or jugular vein. CG. Involuted auditory vesicle. CO points to the end which win form the cochlear canal. RL. Recessus labyrinthi. Ay. hypoblast lining the alimentary canal. Ay is itself placed in the cavity of the alimentary canal, in that part of the canal which will become the throat. The ventral (anterior) wall of the canal is not shewn in the section, but on each side are seen portions of a pair of visceral arches. In each arch is seen the section of the aortic arch AOA belonging to the visceral arch. The vessel thus out through is running upwards towards the head, being about to join, the dorsal aorta AO. Had the section been nearer the head, and carried through the plane at which the aortic arch curves. 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 Foster, M. (Michael), Sir, 1836-1907; Balfour, Francis M. (Francis Maitland), 1851-1882; Sedgwick, Adam, 1854-1913; Heape, Walter, 1855-1929. London ; New York : Macmillan
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Keywords: ., bookcentury1800, bookdecade1880, bookpubli, booksubjectembryology
