. Senescence and rejuvenescence. Age; Reproduction. 3i8 SENESCENCE AND REJUVENESCENCE In the mosses and ferns the separate history of the germ cells may in the male extend back to an early stage in the development of the male sexual organ, the antheridium, where the sperma- togenous cell or cells become separated from the cells of the antheridial wall. Fig. 132 shows the stage of development of the antheridium in which the spermatogenous cells first become segre- gated in Riccia, one of the liverworts. After their segregation. Please note that these images are extracted from scanned page image
. Senescence and rejuvenescence. Age; Reproduction. 3i8 SENESCENCE AND REJUVENESCENCE In the mosses and ferns the separate history of the germ cells may in the male extend back to an early stage in the development of the male sexual organ, the antheridium, where the sperma- togenous cell or cells become separated from the cells of the antheridial wall. Fig. 132 shows the stage of development of the antheridium in which the spermatogenous cells first become segre- gated in Riccia, one of the liverworts. After their segregation. 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
