成年大通牦牛骨骼肌组织学结构研究

Study on Histological Structure of Skeletal Muscle in Adult Datong Yaks

为了探讨成年大通牦牛骨骼肌组织学特点及对低氧的适应,以平原黄牛为对照,利用光镜和计算机图像分析系统测定骨骼肌肌纤维直径、表面积密度;通过透射电镜比较骨骼肌线粒体的面数密度、面积密度、体积密度、平均体积等结构参数。结果显示,成年大通牦牛具有肌纤维直径小、表面积密度大的组织学特点,可以通过增加骨骼肌线粒体面数密度、面积密度、体积密度,降低线粒体平均体积来提高其在低氧环境中对氧的利用。

The histological structure of skeletal muscle in adult Datong yaks and plain cattle were studied comparatively to reveal the adaptive mechanisms of yaks to hypoxia environment. The skeletal muscle fiber diameter and surface area density were determined by the light microscope technology and computer image analysis system. Structure parameters such as face number density, number density, area density, volume density, average external volume of mitochondria in skeletal muscle were detected using transmission electron microscope technology. Results showed that the skeletal muscle fiber diameter in adult yaks were smaller than that in adult plain cattle and the skeletal muscle fiber surface area in adult yaks were larger than that in adult plain cattle. In conclusion, Datong yaks can increase the oxygen utilization ability by increasing the numerical density on area, surface density, volume density and reducing the average volume of mitochondria in skeletal muscle.