Cilia

Definition

Cilia are microscopic, hair-like structures protruding from the surface of many eukaryotic cells, which move in a coordinated fashion to either propel the cell or move substances surrounding the cell. They play a crucial role in various physiological processes, including respiration and reproduction.

Related terms

Flagella:

Long, whip-like appendages that propel cells through their environment by undulating motions.

Microtubules:

Cylindrical structures made of tubulin proteins that provide structural support and play a role in intracellular transport and cell division.

Mucociliary clearance: A defense mechanism of the respiratory system where mucus traps pathogens and debris, and cilia transport this mucus out of the airways