National Heart, Lung, and Blood Institute (NHLBI) - When a person has LAM, abnormal muscle-like cells begin to grow out of control in certain organs or tissues, especially the lungs, lymph nodes,
![1. Alveoli are air sacs in the lungs where gas exchange occurs with the blood. The tissue that makes up alveoli is simple squamous epithelium, which is different than the respiratory tract 1. Alveoli are air sacs in the lungs where gas exchange occurs with the blood. The tissue that makes up alveoli is simple squamous epithelium, which is different than the respiratory tract](https://homework.study.com/cimages/multimages/16/403_epithelial_tissue2328907734377936491.jpg)
1. Alveoli are air sacs in the lungs where gas exchange occurs with the blood. The tissue that makes up alveoli is simple squamous epithelium, which is different than the respiratory tract
![Tissue-resident immunity in the lung: a first-line defense at the environmental interface | Seminars in Immunopathology Tissue-resident immunity in the lung: a first-line defense at the environmental interface | Seminars in Immunopathology](https://media.springernature.com/m685/springer-static/image/art%3A10.1007%2Fs00281-022-00964-2/MediaObjects/281_2022_964_Fig1_HTML.png)