umbilical vesicle वाक्य
"umbilical vesicle" हिंदी में umbilical vesicle in a sentenceउदाहरण वाक्य
- At the end of the fourth week the yolk sac presents the appearance of a small pear-shaped opening ( traditionally called the " umbilical vesicle " ), into the digestive tube by a long narrow tube, the vitelline duct.