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. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. MATURATION OF GAMETES 125. BASEMENT MEM OF SE MINI FE R 0 TUBULE SPERM ATOGONIUM INTERSTITIAL CELLS Fig. 65. Semidiagrammatic representation of a part of the seminiferous tubule of the cat testis. male and female germ cells. On the other hand, the word spermatocyte is given to the developing male gamete during the period of chromosome dimi- nution, whereas the word oocyte is applied to the female gamete in the same period. When, however, the perio

. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. MATURATION OF GAMETES 125. BASEMENT MEM OF SE MINI FE R 0 TUBULE SPERM ATOGONIUM INTERSTITIAL CELLS Fig. 65. Semidiagrammatic representation of a part of the seminiferous tubule of the cat testis. male and female germ cells. On the other hand, the word spermatocyte is given to the developing male gamete during the period of chromosome dimi- nution, whereas the word oocyte is applied to the female gamete in the same period. When, however, the perio Stock Photo
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The Book Worm / Alamy Stock Photo

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REFAM4

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7.2 MB (371.1 KB Compressed download)

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1981 x 1262 px | 33.5 x 21.4 cm | 13.2 x 8.4 inches | 150dpi

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. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. MATURATION OF GAMETES 125. BASEMENT MEM OF SE MINI FE R 0 TUBULE SPERM ATOGONIUM INTERSTITIAL CELLS Fig. 65. Semidiagrammatic representation of a part of the seminiferous tubule of the cat testis. male and female germ cells. On the other hand, the word spermatocyte is given to the developing male gamete during the period of chromosome dimi- nution, whereas the word oocyte is applied to the female gamete in the same period. When, however, the period of chromosome diminution is completed and the chromosome number is reduced to the haploid condition, the devel- oping male gamete is called a spermatid while the female gamete is referred to as an ootid or an egg. {Note: the word egg is applied often to the female gamete during the various stages of the oocyte condition as well as after the maturation divisions have been accomplished.) The reduction of chromatin material is not the only effect which the meiotic process has upon the chromatin material, or possibly upon the developing cytosomal structures as well. This fact will become evident during the descrip- tions below concerning the meiotic procedures. Another prominent feature of the gametes during the meiocyte period is their growth or increase in size. This growth occurs during the first part of the meiotic process when the nucleus is in the prophase condition and it involves both nucleus and cytoplasm. The growth phenomena are much more pro- nounced in the oocyte than in the spermatocyte. Due to this feature of growth, the oocyte and spermatocyte also are regarded as auxocytes, that is growing cells, a name introduced by Lee, 1897. The words meiocyte and auxocyte thus refer to two different aspects of the development of the oocyte and the spermatocyte.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for read

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