Definition of yolk stalk in English:

yolk stalk


  • A tubular connection between the yolk sac and the digestive tract of a developing embryo.

    • ‘During this phase of development, the midgut remains attached to the yolk stalk or vitelline duct.’
    • ‘The yolk stalk is also called the umbilical duct, vitelline duct, or oomphalomesenteric duct.’
    • ‘The yolk stalk is the narrow connection between the endoderm of the embryo and the yolk sac.’
    • ‘In viviparous sharks, the yolk stalk that connects the embryo to the yolk grows long in the uterus.’