. Cytology, with special reference to the metazoan nucleus. Cells; Cytology. CHONDRIOSOMES 199 by the spermatozoon. More serious perhaps is the fact that these egg chondriosomes may be very unevenly distributed amongst the blastomeres in cleavage (Duesberg, 1915). An unequal distribution of the chondrio- somes may be brought about experimentally in Hydractinia (Beckwith, 1914) by centrifuging the egg. This does not prejudice the normal development of the larvae. The persistence of the chondriosomes which are undoubtedly present. Fig. 83. The chondriosomes in the fertilization and cleavage of t
. Cytology, with special reference to the metazoan nucleus. Cells; Cytology. CHONDRIOSOMES 199 by the spermatozoon. More serious perhaps is the fact that these egg chondriosomes may be very unevenly distributed amongst the blastomeres in cleavage (Duesberg, 1915). An unequal distribution of the chondrio- somes may be brought about experimentally in Hydractinia (Beckwith, 1914) by centrifuging the egg. This does not prejudice the normal development of the larvae. The persistence of the chondriosomes which are undoubtedly present. Fig. 83. The chondriosomes in the fertilization and cleavage of the egg of Parechinus miliaris. (After Meves, , 1912 and 1914.) A, spermatozoon; B, shortly after entry of the spermatozoon into the egg; C, 2-cell stage ; D, 32-cell stage. c, chondriosome apparatus ; h, head (nucleus) of spermatozoon. in the fertilized egg and embryo, and their development into certain specific cell structures of the adult, especially into neurofibrillae and muscle fibrillae, have been described by Meves (1908) and Duesberg (1910) for the chick, and also for some mammals. According to Arnold (1912) they give rise to the zymogen granules in the 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 Agar, Wilfred Eade, 1882-. London Macmillan
Size: 1625px × 1538px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectcells, bookyear1920
