THE SEMINIFEROUS TUBULES IN DASYURID MARSUPIALS
نویسندگان
چکیده
منابع مشابه
Does female mortality drive male semelparity in dasyurid marsupials?
In some members of the marsupial families Didelphidae and Dasyuridae, males are semelparous, that is, they live for only one mating season. Semelparity is proposed to be the result of the high energy demands of competing for matings with many females during a short breeding season. We argue that high adult female mortality rates between mating and weaning of the offspring selects for a 'bethedg...
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Background This study aimed to investigate whether Artificial Seminiferous Tubules (AST) coated with testicular extra cellular matrix (ECM) support maturation of spermatogenic cells from immature testes. MaterialsAndMethods Medical grade tubes coated with testicular ECM were used. Testes from immature mice were loaded in the concentration of 10000- 20000/ml. Tubes were then immersed in germ cel...
متن کاملThe Morphology of the Seminiferous Tubules of Mammalia
At the Cleveland meeting of the American Association of Anatomists, (1912-1913), Curtis1 reported on wax plate reconstructions of the seminiferous tubules of the white mouse, presenting figures of a model of an entire tubule having an actual length of somewhat over 13 em. The tubule completely reconstructed presents the form of an arch, the two ends of the arch lying in close proximity, each te...
متن کاملP-4: Effect of Chronic Stress on Stereological Properties of Seminiferous Tubules in Adult Male Rats
Background Male fertility and reproduction can affect by stress. The means by which stress influences reproduction is not clearly understood. The aim of the present study was to examine, using stereological methods, the role of glucocorticoids during chronic restraint stress on spermatogenesis. MaterialsAndMethods Twenty four male adult Sprague- Dawley rats were allocated to four equal groups; ...
متن کاملP-36: Morphometric Evaluation of Seminiferous Tubules in Aged Mice Testes after Melatonin Administration
Background: Melatonin, the pineal gland hormone as a direct or indirect antioxidant and free radical scavenger, is involved in the process of both aging and age-related diseases. This study investigates the effects of melatonin on the histology of testicular seminiferous tubules in aged mice. Materials and Methods: Twenty male, white mice, aged 16 months, that weighed 20-23 gr were equally divi...
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ژورنال
عنوان ژورنال: Reproduction
سال: 1975
ISSN: 1470-1626,1741-7899
DOI: 10.1530/jrf.0.0450255