Coelom
Coelom
Coelom (pronounced: /ˈsiːləm/) is a term used in anatomy and embryology to describe a fluid-filled cavity within the body of an animal.
Etymology
The term "coelom" is derived from the Greek word "koilos," which means "hollow" or "cavity."
Definition
A coelom is a major body cavity in animals, structurally formed by the mesoderm. It is lined by an epithelium derived from mesoderm. Coeloms are found in several types of animals, including annelids, mollusks, and vertebrates.
Function
The coelom serves several functions in the body. It allows organs to move freely, cushions them from shock, and provides a space for the diffusion of gases and nutrients.
Related Terms
- Mesoderm: The middle layer of an embryo from which various tissues and organs develop, including the coelom.
- Epithelium: The thin tissue forming the outer layer of a body's surface and lining the alimentary canal and other hollow structures.
- Annelids: A large phylum of segmented worms, including earthworms, leeches, and polychaetes.
- Mollusks: A large phylum of invertebrate animals, many of which have a calcareous shell. It includes snails, slugs, mussels, and octopuses.
- Vertebrates: Large group of animals defined by having a backbone, including mammals, birds, reptiles, amphibians, and fishes.
External links
- Medical encyclopedia article on Coelom
- Wikipedia's article - Coelom
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