| 单词 |
foregut |
| 释义 |
foregut, n. Zool.
Brit. |ˈfɔːgʌt|, U.S. |ˈfɔrˌgət|
[‹ fore- prefix + gut n.]
The first or anterior part of the digestive tube, esp. in an insect or an embryo.
1875Amer. Naturalist 9 654 The digestive cavity is during the third day also, differentiated into the fore-gut and hind-gut. 1893Trans. Amer. Entomol. Soc. 20 176 The fore-gut (œsophagus and crop) extends from the mouth to the second abdominal segment. 1934J. A. Thomson & E. J. Holmyard Biol. for Everyman II. 1314 The Invertebrate's fore-gut or stomodaeum corresponds merely to the front of our mouth. 1974V. B. Mountcastle Med. Physiol. (ed. 13) II. xxxiii. 849/1 The primordia of the heart are contained in the mesoderm on either side of the foregut invagination of the mammalian embryo. 2001G. C. McGavin Essent. Entomol. 44 The midgut epithelium of insects secretes a mucopolysaccharide layer..which envelops the food as it enters from the foregut. |
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