短耳鸮消化系统形态学解剖

为了丰富短耳鸮的形态学资料,对其消化系统进行了解剖观察,结果表明:短耳鸮有锐利的角质喙以利于撕裂食物,舌后端左右分叉,而且分叉的两侧各有一排尖端后指的角质栉状突,可以防止食物滑落;食管纵向皱襞发达,有较大的伸缩性,无明显嗉囊,食管胸段粗大。肌胃壁薄而无明显角质膜,用来进行化学消化,而不起研磨作用;肠道较体长略长,其中小肠最发达,具有不甚发达的双侧盲肠。并与部分肉食和植食性鸟类作了比较。

Morphological Observation on Digestive System of Asio flammeus

The morphological dissection of digestive system of Asio flammeus has been observed by naked eyes and under dissecting microscope. The result shows that Asio flammeus has sharp keratose beak in order to laniate the food. It has a furcation on the tail of tongue, and it has some bomblike papillas pointing towards hind section in two sides of the furcation. These papillas can prevent the escaping of the food. Esophagus locates between trachea and cervical vertebrae, and it has biggish retractility. The crop is not obvious. The tunica cuticula of muscular stomach is not obvious, and muscular stomach is used to do chemical digestion more than grind the food. Intestine is a littel longer than the whole body, and the small intestine is the longest one in the whole intestine. The cecum is not very developed. A comparison between Asio flammeus and some other birds were made.