key term - Ciliated epithelial cells

Definition

Ciliated epithelial cells are specialized cells with hair-like structures called cilia on their surface. They play a critical role in moving mucus and trapped particles out of the respiratory tract.

5 Must Know Facts For Your Next Test

1. Ciliated epithelial cells are primarily found lining the respiratory tract, including the nasal passages, trachea, and bronchi.
2. The coordinated beating of the cilia helps to move mucus and debris upwards towards the throat where it can be swallowed or expelled.
3. These cells form part of the body's first line of defense by trapping and clearing inhaled pathogens and particles.
4. Ciliated epithelial cells work in conjunction with goblet cells which secrete mucus to trap foreign substances.
5. Damage to ciliated epithelial cells from smoking or infections can impair their function, leading to increased risk of respiratory infections.

Review Questions

Related terms

Goblet Cells:

Cells that secrete mucus in order to trap dust, microbes, and other particles.

Mucociliary Escalator:

A mechanism involving cilia and mucus that clears debris from the respiratory tract.

Innate Immune System:

The body's first line of defense against infection, consisting of physical barriers like skin and mucous membranes as well as immune responses.