The liver is the largest digestive gland in poultry, and its growth and development are vital for playing functions. In the current study we observed the development of broiler liver tissue with the histological method, and compared the differences of the development of liver tissue between fat and lean lines during embryonic period. We found that the lobes of liver become bigger with developing, and the hepatic lobule structure was integrity when chicken embryo was 12-day-old. The hyper-plastic and hypertrophic growth lipid droplets in liver cells significantly increased in the later stage of the embryogenesis, and the proliferation activity of liver cells located around was stronger than those which located in the center of the lobes of liver. During the whole embryonic period, there was no difference on the deposition of lipid droplets between the two lines.%肝脏是家禽体内最大的消化腺,其发生发育与功能的行使紧密相连.本研究从组织学的角度观察肉鸡肝脏组织在胚胎发育过程中的特点,并比较高、低脂系间肝脏组织在发育过程中的区别.结果发现,肝叶体积随日龄的增长而增加；胚胎发育至12日龄时肝小叶结构基本发育完整；在胚胎发育后期,肝细胞内脂滴明显增加,且肝叶周边的肝细胞较肝叶中心的肝细胞增殖活动旺盛.而在整个胚胎发育过程中,两系间肝细胞内脂滴沉积并没有明显的区别.
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