alveoli

Term: Alveoli

Definition: Alveoli are tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide occurs between the air and the bloodstream.

Phonetic Pronunciation: (al-VEE-oh-lie)

Etymological Origin: The term "alveoli" is derived from the Latin word alveolus, meaning "small cavity" or "hollow." It is the diminutive form of alveus, which means "trough" or "basin." The term has been used in anatomy since the 17th century to describe the small sac-like structures in the lungs.

Significance in Asbestos Context: Alveoli are critical in the context of asbestos exposure because they are directly affected by inhaled asbestos fibers. When asbestos fibers are inhaled, they can reach the alveoli, causing inflammation and scarring (fibrosis). This damage can lead to conditions such as asbestosis, where the alveoli lose their elasticity and ability to facilitate gas exchange, resulting in breathing difficulties. The role of alveoli in asbestos-related diseases is central to understanding the progression of lung damage and the health impacts of asbestos exposure.

Synonyms or Related Terms: Air sacs, pulmonary alveoli, lung alveoli.

Example Sentence: "The inhalation of asbestos fibers can cause scarring in the alveoli, leading to reduced lung function and conditions like asbestosis."

Common Misconceptions:

1. Misconception: Alveoli are only affected by smoking.
   Clarification: While smoking can damage alveoli, other factors, such as asbestos exposure, infections, and environmental pollutants, can also harm these structures.
2. Misconception: Alveoli can regenerate after damage.
   Clarification: Unlike some tissues in the body, alveoli have limited regenerative capacity. Damage caused by asbestos exposure, such as fibrosis, is typically irreversible.
3. Misconception: Alveoli are large structures in the lungs.
   Clarification: Alveoli are microscopic structures, with each lung containing millions of them to maximize the surface area for gas exchange.