脊椎动物鸟类食管的后段暂时贮存食物的膨大部分,称为嗉囊。食物在嗉囊里经过润湿和软化,再被送入前胃和砂囊,有利于消化。嗉囊有单个的,如鸡,或成对而横位扩张,如鸠(jiū)。麝雉的嗉囊壁为肌肉质,对其中贮的粗糙树叶,能起一定的机械磨碎作用。鸭和鹅虽无嗉囊,但食管在该处略呈纺锤状膨大。鸽的嗉囊在育雏期间能分泌乳汁,称“ 鸽乳 ”,用以哺育雏鸽。
她摸摸它们的嗉囊,就能知道它们吃了什么;她的脸扮演的是一出生动的哑剧,内心流露的种种批评都从脸上显现出来。
She handled their crops, and knew what they had eaten; her face enacted a vivid pantomime of the criticisms passing in her mind.
鸡嗉囊可以制成中药,有助消化的功效。
Chicken crops can be made into Chinese traditional medicines to help people digest food.
食道、嗉囊和胃粘膜上皮表面衬有护膜。
The epithelium in esophagus, crop and stomach is lined with cuticle.
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