Neurula
Neurula
Neurula (pronunciation: /nʊˈrʊlə/) is a stage in the embryonic development of vertebrates. It follows the blastula and gastrula stages and is characterized by the initiation of neurulation, the process by which the neural tube forms.
Etymology
The term "neurula" is derived from the Greek word "neuron" meaning "nerve" and the Latin suffix "-ula" meaning "small". This refers to the formation of the small, initial structure of the nervous system during this stage.
Process
During the neurula stage, the ectoderm layer of the embryo folds inwards to form the neural tube. This tube will eventually develop into the central nervous system, consisting of the brain and spinal cord. The formation of the neural tube is a critical process in the development of the nervous system and is regulated by various genes and proteins.
Related Terms
- Neurulation: The process by which the neural tube forms during the neurula stage.
- Neural Tube: The structure that forms during neurulation and develops into the central nervous system.
- Ectoderm: The outermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the epidermis, nerve tissue, and nephridia.
- Central Nervous System: The part of the nervous system that consists of the brain and spinal cord.
- Blastula: An animal embryo at the early stage of development when it is a hollow ball of cells.
- Gastrula: An embryo at the stage following the blastula, when it is a hollow cup-shaped structure having three layers of cells.
External links
- Medical encyclopedia article on Neurula
- Wikipedia's article - Neurula
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