EXOGASTRULA Meaning and
Definition
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The term "exogastrula" refers to a developmental stage in the embryonic development of certain organisms, particularly in the animal kingdom. It is commonly used in the field of zoology and embryology to describe a specific type of gastrula, which is a stage in which the embryo consists of two layers of cells arranged concentrically.
During exogastrulation, a process known as "invagination" occurs. This refers to the inward bending of the outer layer of cells, causing it to form a pocket that extends into the inner layer. Essentially, exogastrulation involves the extrusion or protrusion of an isolated blastocoel or part of the blastocoel outside the embryo. As a result, the embryo assumes a distinct shape resembling a hollow sphere.
The exogastrula stage is characterized by the presence of an opening, known as the "blastopore," which connects the inner and outer cellular layers of the embryo. This blastopore eventually develops into the organism's mouth or anus, depending on the specific developmental pathway and phylum.
Exogastrulation plays a crucial role in the formation of body axes and tissue patterning during embryogenesis. It is a fundamental process that allows cells to rearrange and differentiate, laying the foundation for the development of various organ systems.
Overall, exogastrula refers to a specific stage in embryonic development where the embryo undergoes invagination, leading to the formation of a distinctive structure facilitating subsequent tissue specialization and morphogenesis.
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A gastrula in which the endoderm is turned.out instead of in.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for EXOGASTRULA
- wxogastrula
- sxogastrula
- dxogastrula
- rxogastrula
- 4xogastrula
- 3xogastrula
- ezogastrula
- ecogastrula
- edogastrula
- esogastrula
- exigastrula
- exkgastrula
- exlgastrula
- expgastrula
- ex0gastrula
- ex9gastrula
- exofastrula
- exovastrula
- exobastrula
- exohastrula
Etymology of EXOGASTRULA
The word "exogastrula" is composed of two roots: "exo-" and "gastrula".
1. "Exo-" comes from the Greek prefix "exō" (ἔξω), which means "outside" or "external". It can be found in various terms like "exoskeleton" (external skeleton) and "exoplanet" (a planet outside of our solar system).
2. "Gastrula" comes from the Greek word "gastéra" (γαστήρα), meaning "stomach" or "belly". In biology, it refers to the embryonic stage after the blastula, where the embryo develops three germ layers: ectoderm, endoderm, and mesoderm.
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