长耳鸮消化系统形态学研究

Morphological Observation on Digestive System of Asio otus

为了丰富长耳鸮的形态学资料,对其消化系统进行了解剖观察,结果表明∶长耳鸮有锋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;食管位于气管和颈椎之间,有较大的收缩性;嗉囊不明显;食道胸段粗大,伸缩性强;肌胃壁薄而无明显角质膜,在很大程度上用来进行化学消化,而不是起到研磨的作用;肠道较体长略长,其中小肠为肠道内最长的一段,具有不甚发达的双侧盲肠。并将长耳鸮消化系统与部分肉食和植食性鸟类作了比较。

In order to enrich morphological materials of Asio otus , the bird was dissected to observe its digestive system. The result indicated that Asio otus had sharp horn beak for lancinating the food and furcation on the back - end of tongue. Both sides of the tongue furcation had horniness papillas pointing towards hind. These papillas could prevent food to fall. Its Esophagus located between the trachea and the cervical vertebrae and could anastole. The crop was not obvious. The esophagus chest section is thick. The stomach wall was thin to use for chemical digestion not grinding food. The intestine is a little longer than the body and the small intestine is the longest in the whole intestine. The two-sided cecum is not very developed. At last, the digestive system of Asio otus was compared with those of partial meat and the phytophagy birds