Choanocyte
Choanocyte
Choanocyte (pronounced: koh-AN-oh-site) is a type of cell found in sponges, a group of simple multicellular animals. The term is derived from the Greek words 'choane', meaning 'funnel', and 'kytos', meaning 'cell'.
Function
Choanocytes, also known as "collar cells", are responsible for creating water currents through the sponge's body, which aids in filter feeding and respiration. They have a central flagellum surrounded by a collar of microvilli which captures food particles and oxygen from the water.
Structure
The structure of a choanocyte is unique and complex. It consists of a nucleus, a Golgi apparatus, a mitochondria, and a flagellum which is surrounded by a collar made up of microvilli.
Related Terms
- Osculum: The large opening in a sponge's body through which water exits after passing through the choanocytes.
- Mesohyl: The gelatinous matrix within a sponge where choanocytes are embedded.
- Pinacocyte: These are the flat cells that cover the outer surface of the sponge.
Etymology
The term 'Choanocyte' is derived from the Greek words 'choane', meaning 'funnel', and 'kytos', meaning 'cell'. This is in reference to the unique funnel-like structure of these cells.
Pronunciation
Choanocyte is pronounced as koh-AN-oh-site.
External links
- Medical encyclopedia article on Choanocyte
- Wikipedia's article - Choanocyte
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