choanocyte
Noun: A specialized cell found in sponges (phylum Porifera) that has a single flagellum surrounded by a collar of microvilli. Choanocytes are responsible for generating water currents through the sponge's body and for capturing food particles from that water.
The word "choanocyte" is a scientific term used specifically in zoology and marine biology to describe a key structural and functional cell type in sponges. It is used as a countable noun.
- Under the microscope, the biologist observed the choanocyte beating its flagellum to draw in water.
- The feeding process of a sponge depends on the efficient operation of its many choanocytes.
- Each choanocyte filters microscopic food from the water passing through the sponge's canals.
- Choanocyte chamber: A cavity or region within a sponge's body where numerous choanocytes are grouped together to increase filtering efficiency.
- Water is forced through the choanocyte chamber where food is extracted.
- Choanoderm (noun): The layer of tissue in a sponge that is primarily composed of choanocytes.
- Choanosomal (adjective): Relating to the inner, supportive tissue of a sponge where choanocyte chambers are often located.
- Collar cell: This is a direct, descriptive synonym for "choanocyte," referring to the cell's distinctive collar-like structure.
The term refers exclusively to this unique cell in sponges. Its primary functions are: 1. Propulsion: Using the flagellum to create a unidirectional water current. 2. Feeding: Trapping bacteria and other food particles on the sticky collar of microvilli. 3. Reproduction: In some sponge types, choanocytes can transform into sperm cells.
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any of the flagellated cells in sponges having a collar of cytoplasm around the flagellum; they maintain a flow of water through the body
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