. Senescence and rejuvenescence. Age; Reproduction. Figs. 128-131.—Gametes of fungi: Fig. 128, oogonium of SaproUgnia, contain- ing several eggs and antheridial tube piercing its wall in fertilization (from Coulter, etc., '10); Figs. 129-131, three stages in formation and union of gametes in Mucor (from Brefeld, '72). the spermatogenous cells undergo numerous divisions and finally give rise to spermatozoids. The female gamete, on the other hand, is not separated from other non-gametic cells until the last division preceding fertihzation. Figs. 133-39 show the development of the archegonium of
. Senescence and rejuvenescence. Age; Reproduction. Figs. 128-131.—Gametes of fungi: Fig. 128, oogonium of SaproUgnia, contain- ing several eggs and antheridial tube piercing its wall in fertilization (from Coulter, etc., '10); Figs. 129-131, three stages in formation and union of gametes in Mucor (from Brefeld, '72). the spermatogenous cells undergo numerous divisions and finally give rise to spermatozoids. The female gamete, on the other hand, is not separated from other non-gametic cells until the last division preceding fertihzation. Figs. 133-39 show the development of the archegonium of Riccia. The divisions of the central cell in Fig. 135 produce the four neck canal cells and the ventral cell (Fig. 137). Fig. 138 shows the division of the ventral cell which gives rise to the ventral canal. 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 Child, Charles Manning, 1869-1954. Chicago, Ill. , The University of Chicago Press
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectreproduction, bookyea
