| 单词 | umbilical vesicle |
| 释义 | umbilical vesicle (once / 347627 pages) n WORD FAMILY umbilical vesicle: umbilical vesicles USAGE EXAMPLESThe very wide opening, through which the gastric cavity at first communicates with the umbilical vesicle, becomes narrower and narrower, and at last disappears altogether. Haeckel, Ernst Heinrich Philipp August, The Evolution of Man — Volume 1(2010) The yelk-sac is reduced to a small pear-shaped umbilical vesicle; its thin pedicle, the long vitelline duct, is enclosed in the umbilical cord. Haeckel, Ernst Heinrich Philipp August, The Evolution of Man — Volume 1(2010) This is the yelk-sac, or "umbilical vesicle," the origin of which we have considered previously. Haeckel, Ernst Heinrich Philipp August, The Evolution of Man — Volume 1(2010) n membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional Syn|Hyper vesicula umbilicus, vitelline sac, yolk sac sac a structure resembling a bag in an animal |
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