Celom
Celom
Celom (pronounced: /ˈsiːləm/), also known as coelom, is a term used in anatomy and embryology to describe a fluid-filled cavity within the body of an organism. The term is derived from the Greek word 'koilos', meaning 'hollow' or 'cavity'.
Definition
A celom is a primary body cavity, typically lined with mesoderm. It is found in many multicellular organisms, including mammals, birds, reptiles, and amphibians. The celom serves as a protective cushion for the body's internal organs, allowing them to move and grow independently of the body wall.
Function
The main function of the celom is to cushion and protect the internal organs from shock. The fluid within the celom also allows for the free movement of the organs, preventing friction. In some animals, the celom may also play a role in respiration and excretion.
Types of Celom
There are three types of celom:
- Acoelomates: These are organisms that do not have a celom, such as flatworms.
- Pseudocoelomates: These organisms have a pseudocoelom, which is a cavity not entirely lined with mesoderm, such as nematodes.
- Coelomates: These organisms have a true celom, which is a cavity entirely lined with mesoderm, such as annelids, mollusks, arthropods, and vertebrates.
Related Terms
External links
- Medical encyclopedia article on Celom
- Wikipedia's article - Celom
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