Cilium: meaning, definitions and examples

biological cell

A cilium is a microscopic, hair-like structure that extends from the surface of a eukaryotic cell. It plays a crucial role in movement and sensory functions. Cilia can be found in various types of organisms, including protozoa and certain animal cells. The primary function of cilia is to facilitate movement, either by beating in a wave-like motion or by propelling the cell through liquid. Additionally, cilia are involved in the transport of fluids across the surface of some cells.

appendage, flagellum, hair.

Examples of usage

• The respiratory tract contains cilia that help to expel mucus.

• Some protozoa use cilia for locomotion.

• Cilia on the surface of epithelial cells help to move particles.

• Damage to cilia can lead to respiratory diseases.