feed home

What is the cell division process directly related to the embryonic development?

The embryonic development depends directly on mitosis. Through this type of cell division the zygote divides itself giving birth to a series of cells that by mitosis too compose differentiated tissues and organs until the formation of a complete individual.

What is the function of the vitellus in the vertebrate egg? How are these eggs classified according to the amount of vitellus within them?

Vitellus (yolk) is the nutritive material that accumulates in the cytoplasm of the egg (zygote) with the function of nourishing the embryo. According to the amount of vitellus in them, the vertebrate eggs are classified as oligolecithal (little yolk), centrolecithal, or heterolecithal (more yolk diffusely distributed) and telolecithal (more yolk concentrated in one end of the egg).

What are the animal pole and the vegetal pole of the vertebrate egg?

The animal pole of a telolecithal egg is the portion of the egg with little vitellus, it is opposite to the vegetal pole that is the region where the yolk is concentrated.