| 单词 |
proventriculus |
| 释义 |
‖ proventriculus Zool.|prəʊvɛnˈtrɪkjʊləs|
[mod.L., f. prō, pro-1 + ventriculus ventricle, dim. of venter belly.]
a. Ornith. The glandular or true stomach of birds, which lies between the crop and the gizzard.
1835–6Owen in Todd's Cycl. Anat. I. 319/1 The proventriculus varies..in form and magnitude in different birds. 1870Rolleston Anim. Life Introd. 51 In adult Birds, the digestive tract is characterized by the absence of teeth.., and by the presence of a horny beak, and of a muscular gizzard placed posteriorly to a glandular proventriculus. 1886Athenæum 30 Jan. 171/3 The ostrich's proventriculus.
b. A glandular expansion of the lower part of the œsophagus in some Mammalia.
1875C. C. Blake Zool. 52 The proventriculus of the Dormouse and Beaver.
c. In Invertebrata: in some insects, the crop or ingluvies, an expansion of the œsophagus having thick muscular walls armed with horny prominences; in worms, a muscular crop.
1877Huxley Anat. Inv. Anim. vii. 411 The proventriculus leads posteriorly into a narrow, thick-coated canal. 1904Brit. Med. Jrnl. 17 Sept. 665/2 The intestinal canal [of the larva] commences as a short oesophagus, which ends in a proventriculus. |
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