Editing Pulmonary alveolus (section)

===Alveolar macrophages===
The [[alveolar macrophage]]s reside on the internal luminal surfaces of the alveoli, the alveolar ducts, and the bronchioles. They are mobile scavengers that serve to engulf foreign particles in the lungs, such as dust, bacteria, carbon particles, and blood cells from injuries.<ref>{{cite encyclopedia | chapter = The trachea and the stem bronchi | chapter-url = http://www.britannica.com/EBchecked/topic/483141/pulmonary-alveolus | title = Encyclopædia Britannica | publisher = Encyclopædia Britannica, Inc.}}</ref> They are also called ''pulmonary macrophages'', and ''dust cells''. Alveolar macrophages also play a crucial role in immune responses against viral pathogens in the lungs.<ref name=":1">{{Cite journal |last1=Malainou |first1=Christina |last2=Abdin |first2=Shifaa M. |last3=Lachmann |first3=Nico |last4=Matt |first4=Ulrich |last5=Herold |first5=Susanne |date=2023-10-02 |title=Alveolar macrophages in tissue homeostasis, inflammation, and infection: evolving concepts of therapeutic targeting |url=https://www.jci.org/articles/view/170501 |journal=Journal of Clinical Investigation |language=en |volume=133 |issue=19 |doi=10.1172/JCI170501 |issn=1558-8238 |pmc=10541196 |pmid=37781922}}</ref> They secrete cytokines and chemokines, which recruit and activate other immune cells, initiate type I interferon signaling, and inhibit the nuclear export of viral genomes.<ref name=":1" />