Vitelline Sac (Noun)
Meaning
Membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional.
Classification
Nouns denoting animals.
Examples
- The vitelline sac, which initially contains yolk and nutrient-rich fluids, is essential for embryonic development.
- The circulatory system in early mammalian embryos consists of a network of blood vessels connected to the vitelline sac.
- Nutrient-rich blood flows through the umbilical vessels from the mother into the vitelline sac to supply the developing embryo.
- Before the placenta is fully established, the embryo's energy is mainly provided by the contents of the vitelline sac.
- Failure to develop the yolk sac properly and properly reabsorb its blood into the embryonic circulatory system results in nutrient deficiency that the placenta then takes over after breakdown of the vitelline sac