. Text-book of normal histology: including an account of the development of the tissues and of the organs. Section of testicle of dog, includingpart of seminiferous tubule : a, zone ofparietal cells containing sustentacularelements {/); b, mother - cells; c,daughter-cells; d, free nuclei of sper-matoblasts and developing sperma-tozoa. 2IO NORMAL HISTOLOGY. developing spermatozoa, embedded within a finely granular, semi-gelatinous substance. Spermatogenesis varies among the different classes of vertebrateanimals ; tlic account here given refers to man and the highermammals. The originally round
. Text-book of normal histology: including an account of the development of the tissues and of the organs. Section of testicle of dog, includingpart of seminiferous tubule : a, zone ofparietal cells containing sustentacularelements {/); b, mother - cells; c,daughter-cells; d, free nuclei of sper-matoblasts and developing sperma-tozoa. 2IO NORMAL HISTOLOGY. developing spermatozoa, embedded within a finely granular, semi-gelatinous substance. Spermatogenesis varies among the different classes of vertebrateanimals ; tlic account here given refers to man and the highermammals. The originally round spermatoblasts soon exhibit a tendency toelongate and to become pyriform ; several such cells, with partially-formed spermatic filaments, are often crowded together by the pressureof the surrounding elements, and, in consequence, come to lie inclose relation and in apparent union with the centrally projectingprotoplasm of the sustentacular cells. Such appearances, probably Fig. 253. Fig.
Size: 1543px × 1620px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublisherphiladelphiajblipp
