Avaliação histológica do trato genital interno de jacaré anão Paleosuchus palpebrosus Cuvier, 1807

Abstract

This research proposes a histological evaluation of dwarf alligator (Paleosuchus palpebrosus) testicles and epididymes. As structures of the genital tract were collected from euthanized animals, being separated from testicles, epididymis and part of the deferred ducts that undergo routine historical techniques for the knowledge of their morphologies. The test is recovered by a capsule of fibromuscular connective tissue. Spermatogonia are spherical cells with round nuclei and loose chromatin. Primary spermatocytes have a dark cytoplasm and a rounded nucleus, evident nucleoli and pale chromatin. Sertoli cells have a large, pale pleomorphic nucleus and one or two prominent nucleoli. As we expect to alter the nucleus that changes the oval, cylindrical or filament circle, being more condensed and with clear cytoplasm. The epididymis is a tunnel lined by a tall simple cylindrical epithelium with stereocilia and the deferent duct by a ciliated cylindrical pseudostratified epithelium. The presence of the adrenal gland located in the dorsomedial portion of the testis was observed.