Postnatal evolution of the rat pineal gland: light microscopy.

AUTOR(ES)

Calvo, J

RESUMO

The postnatal development and morphology of the adult albino rat pineal gland was studied from one day up to ten months of age. During postnatal life there was a marked increase in gland and pinealocyte volume, more intense during the first 45 days. After ten days, the differences in nuclear morphology of parenchymal cells showed two different types of pinealocyte. The characteristic adult arrangement of pinealocytes in cords and pseudo-rosettes was observed after 15-20 days. After 75 days there was a progressive increase in the number of connective tissue fibres.

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