The germinal vesicle
- the blastula of a placental mammal by which some differentiation of cells features happened
- The germinal vesicle.
A thin-walled hollow structure during the early embryonic development which has a cluster of cells called the internal mobile mass from where the embryo arises. The exterior layer of cells offers rise towards the placenta and other encouraging tissues necessary for fetal development in the uterus while the internal cellular size cells offers increase towards cells associated with human body.
1876, from blasto- + cyst.
(n.) The germinal vesicle.