What does yolk sac mean?
Definitions for yolk sac
yolk sac
This dictionary definitions page includes all the possible meanings, example usage and translations of the word yolk sac.
Princeton's WordNet
yolk sac, vitelline sac, umbilical vesicle, vesicula umbilicusnoun
membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
yolk sacnoun
membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo
Wiktionary
yolk sacnoun
A membranous sac attached to an embryo, providing early nourishment in the form of yolk in bony fishes, sharks, reptiles, birds, and primitive mammals.
ChatGPT
yolk sac
The yolk sac is an extra-embryonic membrane that provides nourishment to the developing embryo in the initial stages of pregnancy. It is also involved in the creation of the embryo's first blood and germ cells. Later in development, functions of the yolk sac are taken over by the placenta.
Wikidata
Yolk sac
The yolk sac is a membranous sac attached to an embryo, providing early nourishment in the form of yolk in bony fishes, sharks, reptiles, birds, and primitive mammals. It functions as the developmental circulatory system of the human embryo, before internal circulation begins.
U.S. National Library of Medicine
Yolk Sac
The first of four extra-embryonic membranes to form during EMBRYOGENESIS. In REPTILES and BIRDS, it arises from endoderm and mesoderm to incorporate the EGG YOLK into the DIGESTIVE TRACT for nourishing the embryo. In placental MAMMALS, its nutritional function is vestigial; however, it is the source of INTESTINAL MUCOSA; BLOOD CELLS; and GERM CELLS. It is sometimes called the vitelline sac, which should not be confused with the VITELLINE MEMBRANE of the egg.
Matched Categories
Numerology
Chaldean Numerology
The numerical value of yolk sac in Chaldean Numerology is: 2
Pythagorean Numerology
The numerical value of yolk sac in Pythagorean Numerology is: 5
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"yolk sac." Definitions.net. STANDS4 LLC, 2024. Web. 26 Apr. 2024. <https://www.definitions.net/definition/yolk+sac>.
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