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Ars Vet.; 24(2): 122-126, 2008.

Artigo em Português | VETINDEX | ID: vti-714892

Resumo

In order to verify the morphological changes of the female reproductive tract of Nelore cows, 20 right and left ovaries of 20 3-to-7-years-old cows and 20 heifers aged approximately 2 years were collected in a slaughterhouse. After anatomical measurements and histological analysis were carried out, conclusions were: 1 - The highest measurements and weights were of the ovaries of cows, as well as the right organs for two groups; however, height showed no significant difference between groups, although significant difference was documented between sides; 2 - The frequency of corpora lutea was higher for cows and significantly greater in the right side in the group of cows and heifers; the frequency of mature follicles was higher for heifers, though no significant difference between the sides was observed in both groups; 3 - The ovaries of cows showed a more developed cortical as compared to the medulla, whereas heifers presented the medullar region more extensive than the cortical; 4 - The coating epithelium varied from pavimentous to cubic, and the tunica albuginea and interstitial tissue were typical for cows and heifers; 5 -  Primordial, primary and growing follicles were present in small numbers in cows, whereas a great quantity of the two latter was seen in heifers; 6 The mature follicles were typical, although vesicular structures near the oocytes were

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Com a finalidade de se verificar as variações morfológicas do aparelho reprodutor de bovinos fêmeas da raça Nelore, foram coletados em abatedouro, 20 ovários direitos e esquerdos de 20 vacas com idade variando de 3 a 7 anos e de 20 novilhas com idade aproximada de 2 anos. Após as mensurações anatômicas e análises histológicas, concluiu-se que: 1- As maiores mensurações e pesos foram dos ovários das vacas e dos lados direitos para os dois grupos; porém a altura não apresentou diferença significativa entre os grupos, mas apresentou diferença significativa entre os lados, 2- A freqüência de corpos lúteos foi maior para as vacas e significativamente maior para os lados direitos nos grupos de vacas e novilhas e a freqüência de folículos maturos foi maior para as novilhas, porém, sem diferença significativa entre os lados para ambos os grupos, 3- Os ovários das vacas mostraram cortical mais desenvolvida que a medular e as novilhas acusaram a medular mais extensa que a cortical, 4- O epitélio de revestimento variou de pavimentoso a cúbico, a túnica albug&

Biblioteca responsável: BR68.1