The gastrula arising from cleavage that takes place at the surface of the ovum. Cf. periblastula, n., pericytula, n., perimonerula, n., perimorula, n.
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| 单词 | θ18867 |
| 释义 | the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > [noun] > gastrula, etc. (6) perigastrula1876 The gastrula arising from cleavage that takes place at the surface of the ovum. Cf. periblastula, n., pericytula, n., perimonerula, n., perimorula, n. gastraea1877 = gastrula, n. gastrula1877 That form of the metazoic germ which consists of a cup with two layers of cells in the wall. paragastrula1887 A stage in the development of the larva of certain calcareous sponges, formed by invagination of the amphiblastula. Subcategories:— formation of (2) |
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