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A modified muscular pouch immediately behind the stomach in the alimentary canal of birds, having a thick lining and often containing ingested grit, which aids in the mechanical breakdown of seeds before digestion.
英
美
释义
砂囊,胗紧靠在鸟类食道的胃部后面的变化的肌肉小袋,有厚的衬层并含有摄取的砂粒,有助于在消化之前磨碎种子
以上内容独家创作,受著作权保护,侵权必究
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