不同年龄母牦牛垂体和松果体的形态学观测

Morphological Observation on Pituitary and Pineal Glands of Yak in Different Ages

本研究选用甘南玛曲1月龄、1岁、2岁和成牛母牦牛各5头,共20头,采用解剖学方法对其垂体和松果体的大小、重量及关系位置等进行了系统的观测。结果表明:(1)、牦牛垂体、松果体在体内的关系位置与奶牛和黄牛一致。(2)、牦牛的垂体呈"葫芦状",前端大,后端小,中间有一"腰";其大小及重量随年龄的增长而增加。(3)、幼年至青年牦牛的松果体状似"碗豆",至成年时接近椭园形;其大小及重量亦随年龄的增长而增加。

Twenty female yaks were used to examine the morphological Characteristics of pituitary and pineal glands in this study. They were divided into four age groups: Group Ⅰ, lmonth; Group Ⅱ, 1 year; Group Ⅲ, 2 years and Group Ⅳ, 7—10gears. The results showed that the location and the relationship of these glands in yak were similar to those of other domestic ruminant animals. The pituitary gland was irregularly oval, with a channel around its median part. The pineal gland in young yak was rather round, like a broad bean, and was oval in outline in adult yak. The size and the weight of both the glands became larger or heavier with ththe increase of the age.