褐家鼠与大仓鼠消化系统比较

Comparison of digestive system between Rattus norvegicus and Cricetulus triton

为了解褐家鼠(Rattus norvegicus)与大仓鼠(Cricetulus triton)消化系统之间的差异,试验对两种鼠进行解剖。结果表明,褐家鼠食管平均长度占体长比值是大仓鼠的0.873倍;胃(不含内容物)的平均质量占体重比值是大仓鼠的0.462倍;小肠平均长度占体长的比值是大仓鼠的1.557倍,大肠平均长度占体长比值是大仓鼠的0.383倍,盲肠平均长度占体长比值是大仓鼠的0.283倍;肝重与体重比值是大仓鼠的1.190倍。两种鼠的消化系统中器官长度和结构有多处差异,两种鼠对于食物质量选择的分化程度明显,且褐家鼠食物选择广泛,大仓鼠对植物性食物依赖性更高。

5 mice of each kind were dissected to understand the difference of the digestive system between Rattus norvegicus and Cricetulus triton. The results showed that there had many differences between the two kind ’s mice in the length and structure of the organism in digestive system. The average esophagus length against body length ratio of Rattus norvegicus was 0.873 times to that of Cricetulus triton;the average stomach(no content) weight against body weight ratio was 0.462 times to that of Cricetulus triton. The ratio of the average small intestine length, large intestine length and cecum length to body length was 1.557, 0.383 and 0.283 times that of Cricetulus triton, respectively. The liver weight to body weight ratio was 1.190 times to that of Cricetulus triton. The differentiation of the two kinds of rats for food quality selection also showed obvious difference. Cricetulus triton was more dependent on plants while the food selection of Rattus norvegicus was extensive.