Pulmonary epithelial cells are specialized cells that line the surface of the airways and alveoli (tiny air sacs) in the lungs. They play an important role in maintaining the structure and function of the respiratory system.

There are two main types of PE cells: type I and type II. Type I cells are thin, flat cells that form a barrier between the air sacs and the bloodstream, allowing for the exchange of oxygen and carbon dioxide. Type II cells are larger, cuboidal cells that secrete surfactant, a substance that helps to keep the air sacs open and prevent them from collapsing.

This cells also play a role in immune defense by producing and secreting various proteins and enzymes that help to protect the lungs from pathogens and other harmful substances.

Damage to these cells can occur due to exposure to toxins, infection, or other factors. This can lead to respiratory diseases such as asthma, chronic obstructive pulmonary disease (COPD), and lung cancer. Understanding the functions and properties of pulmonary epithelial cells is crucial for developing treatments for these conditions.

Regenerate response