Definition

1. Noun:
   • Mouth of a protozoan: A specialized, permanent cell structure that functions as the mouth or ingestion site in certain protozoans, particularly ciliates and some flagellates. It is the opening through which the organism takes in food particles.

Usage Examples

• Noun:
  • The paramecium uses its cytostome to ingest bacteria.
  • Food vacuoles form at the base of the cytostome.
  • The structure of the cytostome is essential for the protozoan's feeding mechanism.

Advanced Usage

• Scientific Context: The term is used almost exclusively in biological and microbiological texts to describe the anatomy of unicellular organisms.
  • Researchers studied the cytoskeletal elements surrounding the cytostome.

Variants and Related Words

• Cytopharyngeal basket (n): A structure associated with the cytostome in some ciliates, involved in guiding food into the cell.
• Cytopharynx (n): The cell "throat" or tube leading inward from the cytostome.

Synonyms

• Cell mouth (n): A less technical synonym.
• Oral groove (n): In some protozoans like the paramecium, this structure leads to the cytostome.

Noun

1. mouth of a protozoan