黑鸢消化系统形态学的初步研究

对黑鸢消化系统的形态学作了初步的观察与研究,结果表明：黑鸢舌尖钝圆,舌根分叉,叉粘膜上具有尖端指向后方的栉状突;食管宽而扁,无明显可见的嗉囊;肌胃无明显的类角质膜;肠道长是体长2．3倍,小肠较发达,K1275mm,古肠道总长的93．6％,具有不发达的双侧盲肠：胰腺短而厚、并与蛇雌、毛脚鸢的消化系统进行了比较。

Morphology of Digestive System of Milvus migrans

The morphological construction of digestive system of Milvus migrans has been observed preliminarily by naked eyes and dissecting microscope.The results indicate that the tip of the tongue is obtuse ,while the root of the tongue is bifurcate ,and there are many bomblike papillae pointing towards the hind section on the fork of the mucous membrane.The esophagus is wide and flat,and there is no crop that obviously can be seen.On the inside of muscaular stomach there is no obvious construction that is similar to cutin membrane.The length of intestine is 2.3 times as long as that of the whole body.The small intestine with 1275mm in length and 93.6% of the whole length of the intestine is relatively developed.The caecum is degenerate.The pancreas is short and thick. Besides,the digestive system of Milvus migrans is compared with that of Spilornis cheela and Buteo lagopus.