NOUN
- membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo
- membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
How To Use yolk sac In A Sentence
- The hypoblast gives rise to extra-embryonic structures such as the stalk of the yolk sac, whereas the embryo proper is formed from the remaining blastoderm cells, known as the epiblast.
- In fish, reptiles and birds, the yolk is contained within a yolk sac which is absorbed into the embryo as the yolk is used. Biology Basic Facts
- Inside the egg are a series of fluid-filled membranes which permit the embryo to survive: the amnion, allantois, yolk sac, and chorion.
- Meckel's diverticulum is the rudiment of the embryonic yolk sac
- The yolk sac was completely absorbed, but the site of attachment was still visible.
- The presence of remnant yolk sacs was a good indication that these were indeed hatchlings emerging from their nests.
- Unlike salmon, cod fry have no yolk sac on which to survive.
- The path along which they travel into the embryo is a very definite one, viz., from the yolk sac upward between the splanchnopleure and gut in the hinder portion of the embryo. XI. Splanchnology. 3. The Urogenital Apparatus
- In fish, reptiles and birds, the yolk is contained within a yolk sac which is absorbed into the embryo as the yolk is used. Biology Basic Facts
- Extraembryonic somatic mesoderm that surrounds the amnion and extraembryonic splanchnic mesoderm (4yolk sac)? what statistical test would i use to assess the impact of two factors on one dependent factor? en Español Yahoo! Answers: Latest Questions
