Start studying Physiological Psych Ch. 3 Quiz Questions. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
secondary oocyte, an oocyte in the period between the first and second maturation division. It is derived from a primary oocyte shortly before ovulation by a division that splits off the first polar body. If fertilized, it divides into an ootid and the second polar body.Otherwise, it perishes.In humans, it is a round cell about 0.1 mm in diameter and consists of protoplasm that contains some yolk enclosed by a thin cell wall, the vitelline membrane. It is surrounded by the zona pellucida and corona radiata.f fertilized, it divides into an ootid and the second polar body. Otherwise, it perishes. In humans, it is a round cell about 0.1 mm in diameter and consists of protoplasm that contains some yolk enclosed by a thin cell wall, the vitelline membrane. It is surrounded by the zona pellucida and corona radiata.
A blastocyst is a distinctive stage of a mamalian embryo. It is a form of Blastula that develops from a berry like cluster of cells, the morula. It continues to form and gro â¦ w from there.he blastocyst is the ball of cells that forms about 5 days â¦ after an egg is fertilized. It consists of about 150 cells and has a trophoblast (outer layer), blastocoel (cavity), and inner cell mass, which is an area of about 30 cells that is from where the main structures of the fetus are formed.