Two difference between blastula and gastrula
Answers
Answer:
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.
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Answer:
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.
Formation
Blastula: Blastula is formed from the morula in the process called blastulation.
Gastrula: Gastrula is formed from the blastula in the process called gastrulation.
Elaboration
Blastula: Rapid mitotic cell divisions result in the blastula.
Gastrula: Slow mitotic cell divisions result in the gastrula.
Structure
Blastula: Blastula is a single-layered, hollow structure.
Gastrula: Gastrula is a three-layered, hollow structure.
Movement of Cells
Blastula: Cells in the morula do not show any movement during the formation of the blastula.
Gastrula: Cell masses are migrated from the surface of the blastula during the formation of the gastrula.
Number of Cells
Blastula: Blastula contains 128 cells.
Gastrula: Gastrula contains more cells than blastula.
Cell Differentiation
Blastula: Blastula comprises of undifferentiated cells.
Gastrula: Gastrula comprises of differentiated cells.
Zona Pellucida
Blastula: Blastula comprises of a zona pellucida.
Gastrula: Gastrula lacks a zona pellucida.
Conclusion
Blastula and gastrula are two multicellular embryonic stages of animals. The main difference between blastula and gastrula is in the structure and components of each of the embryonic stages. Blastula develops from the morula in a process called blastulation. It comprises of an inner cell mass, which develops into the embryoblast. The outer cell layer is the trophoblast, which gives rise to the placenta. Gastrula develops from the blastula in a process called gastrulation. Massive movements of cell masses in the blastula develop the three primary germ layers: endoderm, ectoderm, and mesoderm.
Explanation: