YOLK SAC


Meaning of YOLK SAC in English

Function: noun

Date: 1861

: a membranous sac of most vertebrates that encloses the yolk, is attached in most forms (as in humans) through the yolk stalk with the intestinal cavity of the embryo, and is supplied with blood vessels that transport nutritive yolk products to the developing embryo

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.