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| Kaur,Manjinder; Bansal,Neelam; Uppal,Varinder. |
| The study was conducted on the testes of 18 buffalo foetii to reveal histogenesis and differentiation of different cells of testicular parenchyma. At 8.0 cm CVR (65 days) the seminiferous tubules were present at gonadal periphery and a network of polygonal mesenchymal cells was seen in the centre of testis. These tubules were surrounded by a distinct basement membrane and a single layer of peritubular cells at 10 cm CVR (74 days), which became double layered at 88.0 cm CVR (272 days). The testicular parenchyma at 12.0 cm CVR had two zones; outer zone having longitudinal tubules and inner zone having rounded tubules. But a reverse pattern of their arrangement was observed at 14.0 cm CVR (92 days). The pre-Sertoli cells were first observed in buffalo foetii... |
| Tipo: Journal article |
Palavras-chave: Histogenesis; Testicular parenchyma; Prenatal life; Buffalo. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000400006 |
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| Alibardi, L.. |
| The development of claws in different reptiles and their cornification are analyzed using histological, ultrastructural and autoradiographic methods. Claws develop at the tip of digits in relation to the growth of the terminal phalanx and appear as modified scales. The apical epidermis of digit becomes thickened and is associated with a mesenchymal condensation or a dense mesenchyme. The dorsal side of the digit becomes the unguis while the ventral side becomes the sub-unguis. The corneous layer in the unguis is thicker than in the sub-unguis and accumulates hard-keratin while corneocytes remain separated or partially fused. Bundles of hard-keratin tend to accumulate in parallel orientation with respect to the surface and are directed toward the claw tip.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Autoradiography; Claws; Cornification; Histogenesis; Reptiles; Ultrastructure; 42.82. |
| Ano: 2009 |
URL: http://www.repository.naturalis.nl/record/304588 |
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