What is Blastulation and gastrulation?
Definition. Blastula: Blastula is an animal embryo at the early stage of development when it is a hollow ball of cells. Gastrula: Gastrula is an embryo at the stage following the blastula, when it is a hollow cup-shaped structure having three layers of cells.
What occurs during gastrulation?
During gastrulation, cell movements result in a massive reorganization of the embryo from a simple spherical ball of cells, the blastula, into a multi-layered organism. During gastrulation, many of the cells at or near the surface of the embryo move to a new, more interior location.
What are the stages of conception?
The process of prenatal development occurs in three main stages. The first two weeks after conception are known as the germinal stage, the third through the eighth week is known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.
Which comes first gastrula vs blastula?
During the process of embryogenesis, blastula formation is followed by the gastrula, thus both represents a different stage of embryo formation.
What do you mean by morula?
morula, solid mass of blastomeres resulting from a number of cleavages of a zygote, or fertilized egg. Its name derives from its resemblance to a mulberry (Latin: morum). A morula is usually produced in those species the eggs of which contain little yolk and, consequently, undergo complete cleavage.
What is the difference between blastula morula and gastrula?
Blastula: Blastula develops into the gastrula in a process called gastrulation. Morula: Transferring of morulas on the fifth day after fertilization results in a reasonable pregnancy rate. Blastula: Transferring of blastulas results in a lower pregnancy rate compared to that of morula.
What is blastulation and morula stage?
Blastulation refers to the formation of blastula from morula. A fluid-filled cavity known as blastocoel is developed from morula. Once the cavitation is complete, the embryo is referred to as the blastula. Morula stage can be seen 4-5 days after fertilization.
What is Coeloblastula gastrulation?
A coeloblastula is a hollow ball of cells, one cell thick. Gastrulation in a blastula of this type involves invagination, ingression, or delamination. Invagination involves the blastula folding in on itself, creating a pocket with an opening.
What is blastocoel and morula?
A fluid-filled cavity known as blastocoel is developed from morula. Once the cavitation is complete, the embryo is referred to as the blastula. Morula stage can be seen 4-5 days after fertilization. Blastula is a hollow ball of cells of an animal embryo in its early stages of development.