Alveolar macrophage
Alveolar Macrophage
Alveolar macrophages (pronounced: al-vee-oh-lar mack-row-fay-jez) are a type of macrophage found in the alveoli of the lungs. They are part of the immune system and play a crucial role in the defense against inhaled pathogens and particles.
Etymology
The term "alveolar" is derived from the Latin word "alveolus", meaning "small cavity". This refers to the small air sacs in the lungs where these macrophages are found. The term "macrophage" comes from the Greek words "makros", meaning "large", and "phagein", meaning "to eat". This describes the function of these cells, which is to engulf and digest cellular debris and pathogens.
Function
Alveolar macrophages are responsible for the removal of dust particles and other foreign substances that have been inhaled into the lungs. They do this by engulfing and digesting these particles, a process known as phagocytosis. In addition to this, they also play a role in the immune response to respiratory infections, producing chemicals that help to recruit other immune cells to the site of infection.
Related Terms
- Phagocytosis: The process by which a cell engulfs and digests particles or other cells.
- Macrophage: A type of white blood cell that engulfs and digests cellular debris, foreign substances, microbes, and cancer cells.
- Alveoli: Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.
- Immune System: The body's defense against infectious organisms and other invaders.
External links
- Medical encyclopedia article on Alveolar macrophage
- Wikipedia's article - Alveolar macrophage
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