MORPHOLOGY AND ANUAL CHANGES IN THE OVIDUCT OF EUPHRACTINI (XENARTHRA, ASYPODIDAE) FROM BUENOS AIRES PROVINCE

CODÓN, S.M.; CASANAVE, EMMA BEATRIZ

Facultad de Ciencias Veterinarias Universidad Nacional de La Plata, ARGENTINA

Congreso; IX NATIONAL CONGRESS OF MORPHOLOGICAL SCIENCES (9º Congreso Nacional de Ciencias Morfológicas); 2004

Sociedad Argentina de Ciencias Morfológicas

MORPHOLOGY AND ANUAL CHANGES IN THE OVIDUCT OF EUPHRACTINI (XENARTHRA,  ASYPODIDAE) FROM BUENOS AIRES PROVINCE Codón SM1, Casanave EB2. 1Cátedra de Histología Animal, 2Cátedra de Fisiología Animal, Dpto. de Biol., Bioq. y Fcia., UNS, San Juan 670, B8000FWB Bahía Blanca. 2CONICET. E-mail: smcodon@criba.edu.ar Oviduct’s morphology of Chaetophractus villosus, C. vellerosus and Zaedyus pichiy was studied. Samples were fixed in Bouin´s fixative and processed by standard methods. Ampulla, isthmus and intramural portion were described. The wall has: Mucosa, made up of epithelium and corion of loose connective tissue, has longitudinal folds whose height, number and complexity decrease to the uterus. The columnar simple epithelium is formed by different cellular types, columnar ciliated cells (CC), columnar no ciliated or secretory (SC) and cells of the bottom of the folds (CBF). Muscular, of smooth muscle fibbers, increase in wide to the uterus. In the ampulla, an inner circular layer and outer longitudinal one predominate. In the isthmus there is a wide circular. The intramural portion has no own muscular. Serosa, made up of a thin coat of connective tissue, covered by mesothelium. The histological annual changes of different portions of the oviduct, respond to a common pattern in the three species studied. It is noticeable the presence of CC with cilia, which increase in number towards the isthmus around the time of ovulation, but in C. villosus cilia were never observed in the fimbriae. The SC have apical cytoplasmatic protrusions in the ovulatory phase, but in the isthmus they are less numerous and without protrusions during the entire year. The CBF, absent in fimbriae, have cilia in relation with the ovulatory phase in ampulla and isthmus. Subsided by SGCYT (UNS), Project 24/B086