Invagination

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Invagination

Invagination (pronounced as in-vaj-uh-ney-shuhn) is a term used in biology and medicine to describe the process where a structure folds inwards into itself, forming a pocket or pouch.

Etymology

The term "invagination" is derived from the Latin words "in" meaning "in" and "vagina" meaning "sheath". It was first used in the English language in the 19th century.

Definition

Invagination is a process that occurs during biological development where a part of a structure folds back into itself, creating a pocket or pouch. This process is crucial in the formation of various structures in the body, such as the gastrointestinal tract and the neural tube.

Related Terms

  • Endocytosis: A process by which cells absorb molecules by engulfing them. This process involves invagination of the cell membrane.
  • Gastrulation: A phase early in the embryonic development of most animals, during which the single-layered blastula is reorganized into a multilayered structure known as the gastrula. During gastrulation, invagination of the blastula forms the primitive streak.
  • Neurulation: The process in embryonic development of animals in which the neural plate folds to form the neural tube. Invagination plays a key role in this process.

See Also

External links

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