Keyword: histology

Adaptaciones morfológicas de la lengua de Desmodus rotundus rotundus (Chiroptera: Phyllostomidae) en función de la alimentación

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Morphological adaptations of the tongue of Desmodus rotundus (Chiroptera: Phyllostomidae) related with their feeding habits. An analysis of the external morphology and histomorphology of the tongue, as well as an histochemical analysis of the glands of Desmodus rotundus, are here presented with the purpose of establishing a correlation between these structures and the feeding habits of this species. In the lingual surface they have the typical filiform papillae modified to different degrees of keratinization, and there are fungiform-like papillae in less amount. The intrinsic musculature and the presence of lynphocitary infiltration are described; the presence of important nervous packages was observed.

Estructura del estómago en Akodon azarae y Calomys musculinus (Rodentia; Muridae)

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Se estudia, comparativamente, la morfología y la histología del estómago de Akodon azarae y Calomys musculinus. Los estómagos de ambos son del tipo unilocular y presentan una zona aglandular y una glandular separadas por una plica. Se indican las longitudes y las superficies de cada una. Se describe la histología gástrica y se brinda el espesor de las túnicas que forman la pared del estómago.

Stomach structure in Akodon azarae and Calomys musculinus (Rodentia; Muridae). The comparative morphology and histology of the stomach of Akodon azarae and Calomys musculinus was studied. Both stomachs are unilocular and they have a non-gladular and a glandular areas, divided by a bordering line. Their length and surface are given. The gastric histology and the size of the tunicas are described.

Estudio histológico en gónadas de Ctenomys mendocinus en la localidad de Cacheuta (Mendoza, Argentina)

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En la localidad de Cacheuta (Mendoza, Argentina), ubicada a 1237 m de altura sobre el nivel del mar, se estudiaron los ciclos reproductivos mediante cortes histológicos de gónadas en Ctenomys mendocinus. Se encontró que la actividad sexual probablemente comienza a mediados de invierno hasta comienzos de otoño donde se evidencia una notable regresión gonadal.

Histological study of gonads of Ctenomys mendocinus from Cacheuta (Mendoza, Argentina). The reproductive cycles of Ctenomys mendocinus specimens from Cacheuta (Mendoza, Argentina), at 1237 m above sea level, were studied using histological sections of gonads. Observations led to determine that the sexual activity of this species takes place from July through February–March, and that there is a noticeable period of gonadal regression in April and June.