animal > ballast



Contents ·shā náng ·No. 2 ·English Expression ·More results... shā náng 　　Crop immediately after the digestive tract of birds of a capsule, eating the bird seed is especially well developed, especially those with thick muscular wall and a layer of hard keratin lining, suitable for grinding food, and its regular use of muscle movement Birds swallow gravel to grind food Translated by Google No. 2 　　砂囊（shanang）（1）脊椎动物鸟类的胃分为前胃和砂囊两部分。砂囊又称“肌胃”。它前接前胃，后通小肠。砂囊常具有很厚的肌肉壁，胃腔较小。凡食谷类，坚硬果实以及杂食性的鸟类，其砂囊内面一般都有一层角质皮，囊内贮有吞入的砂石，用以代替牙齿磨碎食物，故称砂囊。但食肉性的鸟类（如鹰等），砂囊壁较薄，且无角质衬里。（2）无脊椎动物蚯蚓的胃壁肌肉也很厚，并有很强收缩力，能磨碎食物，故也称砂囊。 English Expression n.:  ballast,  gizzard,  ventriculus,  gizzard of a bird