Sobre as artérias tiroideas craniais na cobaia (Cavia Porcellus L. 1758) / The cranial thyroid arteries in guinea (Cavia Porcellus, L. 1758)

In this paper we studied the pattern of the cranial thyroid arteries in guinea-pig. We sacrificed 100 young animals (females) that were anesthetized by ethylic eter, injected with Neoprene latex in the thoracic aorta and dissected through stereoscopic microscope. The observations have demonstrated these arteries emerge from the left common carotid artery (87 sides); from the right common carotid artery (38 sides), from the left external carotid artery (03 sides) and from the right occipital artery (01 side). We found one artery by the left side in 44 guineas-pig; by the right side in 04 animals; in both sides in 46 animals and we noted the absence of this artery in 06 animals

Ocorrência de células principais ricas em muco-substâncias neutras no epidídimo de bovino azebuado / Ocurrence of principal cells rich in neutral mucosubstances from the epididymal duct of zebu cattle

Os autores realizaram estudo morfológico e histoquímico de células principais ricas em muco substâncias neutras que ocorrem no segmento inicial do epidídimo de bovino azebuado. Esta observaçäo parece se relacionar com secreçäo de glicogênio e glicoproteínas, glicólise anaeróbica e maturaçäo dos espermatozóides que ocorrem neste segmento