. The cell; outlines of general anatomy and physiology. Cells; Anatomy; Physiology; Cells; Anatomy; Physiology. FiG. 28. Fig. 29. Fig. 2S.—Immature egg from the ovary of an EcTimoderm. In the large germinal vesicle there is a network of threads, the nuclear net, in which the germinal spot can be seen. (O. Hertwig, Embryology, Pig. 1.) Fig. 29.—Germinal ve-icle of a small immature egg from the Frog. In a dense nuclear net (/to) a very large number of germinal spots, mostly peripheral (fef), are to be seen. (O. Hertvs^ig, Embryology, Fig. 2.) ably during the growth of the cell, until finally the
. The cell; outlines of general anatomy and physiology. Cells; Anatomy; Physiology; Cells; Anatomy; Physiology. FiG. 28. Fig. 29. Fig. 2S.—Immature egg from the ovary of an EcTimoderm. In the large germinal vesicle there is a network of threads, the nuclear net, in which the germinal spot can be seen. (O. Hertwig, Embryology, Pig. 1.) Fig. 29.—Germinal ve-icle of a small immature egg from the Frog. In a dense nuclear net (/to) a very large number of germinal spots, mostly peripheral (fef), are to be seen. (O. Hertvs^ig, Embryology, Fig. 2.) ably during the growth of the cell, until finally they may number some hundreds ; whether this multiplication takes place by division or in some other fashion is not yet known. The position of the germinal spots varies at different times; generally, however, they are situated on the surface of the vesicle, being distributed at even distances over the membrane, as is shown in Fig. 29, where the nucleus of a I'ather small immature egg of a frog is depicted. The shape of the germinal spots also varies ; they may be round— this is especially the case when they are isolated—or oval; some- times they are somewhat extended, at others they are constricted in the middle; occasionally they are irregular in outline, and when. 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 Hertwig, Oscar, 1849-1922; Campbell, M. , tr; Campbell, Henry Johnstone, 1859- ed. London, S. Sonnenschein & Co. ; New York, Macmillan & Co.
Size: 1676px × 1490px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectanatomy, booksubjectphysiology, booky
