. The elements of embryology. Chickens -- Embryos. 144 THE FOURTH DAY. [CHAP. Fig. 4;. Section through the Lumbar Region of an Embryo at the End of the Fourth Day. n. c. neural canal, p. r. posterior root of spinal nerve with ganglion, a. r. anterior root of spinal nerve. A. G. C. anterior grey column of spinal cord. A. W. C. anterior white column of spinal cord just commencing to be formed, and not very distinctly marked in the figure, m. p. muscle plate, ch. notochord. Tr. R. Wolffian ridge. A. 0. dorsal aorta. V. c. a. posterior cardinal vein. Wolffian duct; its section is not circular
. The elements of embryology. Chickens -- Embryos. 144 THE FOURTH DAY. [CHAP. Fig. 4;. Section through the Lumbar Region of an Embryo at the End of the Fourth Day. n. c. neural canal, p. r. posterior root of spinal nerve with ganglion, a. r. anterior root of spinal nerve. A. G. C. anterior grey column of spinal cord. A. W. C. anterior white column of spinal cord just commencing to be formed, and not very distinctly marked in the figure, m. p. muscle plate, ch. notochord. Tr. R. Wolffian ridge. A. 0. dorsal aorta. V. c. a. posterior cardinal vein. Wolffian duct; its section is not circular, owing to its being cut through at a point where it is being joined by one of the tubules. W. b. Wolffian body, consisting of tubules and Malpighian corpuscles. One of the latter is represented on each side, that on the left hand having its glomerulus entirely filled with blood corpuscles, g. e. germinal epithelium. M. d. commencing involution of germinal epithelium to form the duct of Mtiller, d. alimentary canal. M. commencing mesentery. S. 0. somato- pleure. S. P. splanchnopleure. V. blood-vessels, pip. pleuroperitoneal 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. London, Macmillan and co.
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherlondo, bookyear1874
