Polarity in embryogenesis - Wikipedia
The vegetal pole contains large yolky cells that divide very slowly, in contrast with the animal pole above it. In some cases, the vegetal pole is thought to differentiate into the extraembryonic …
Cleavage (embryo) - Wikipedia
The pole of the egg with the highest concentration of yolk is referred to as the vegetal pole while the opposite is referred to as the animal pole. Cleavage differs from other forms of cell division …
DEVELOPMENTAL BIOLOGY 3230 - University of Utah
Placental mammals develop a specialized organ through which the embryo is nourished throughout development and so also have little yolk. Many eggs are polarized with a yolk rich …
Vegetal pole Definition & Meaning - Merriam-Webster
The meaning of VEGETAL POLE is the point on the surface of an egg that is diametrically opposite to the animal pole and usually marks the center of the protoplasm containing more yolk.
An Introduction to Early Developmental Processes
When one pole of the egg is relatively yolk-free, the cellular divisions occur there at a faster rate than at the opposite pole. The yolk-rich pole is referred to as the vegetal pole ; the yolk …
2: Fertilization and Cortical Rotation - Biology LibreTexts
The animal and vegetal poles differ in the mRNAs and proteins (see Briefly, Genetics for a refresher on molecular biology terms) 3 and so do the inner and outer parts of the oocyte. …
Oocyte Polarity and the Embryonic Axes: The Balbiani Body, an …
The expanded animal character in bucky ball mutants supports a model, whereby establishing vegetal pole identity breaks symmetry and regulates or alternatively indirectly influences the …
The Early Development of Sea Urchins - Developmental Biology
The cells at the vegetal pole of the blastula begin to thicken, forming a vegetal plate. The cells of the animal half synthesize and secrete a hatching enzyme that digests the fertilization …
Animal development - Embryogenesis, Morphogenesis, …
At one pole, known as the animal pole, the cytoplasm appears to be more active and contains the nucleus (meiotic divisions occur in this region); at the other, called the vegetal pole, the …
Animal development - Embryo Formation, Cell Differentiation ...
As a consequence of the infolding at the vegetal pole, the blastocoel is reduced or obliterated, and a new cavity is created, the primitive gut cavity, or archenteron, which eventually gives …