Yong CHEN1, Yongpin DONG2, Xiaoli DU3,*
BIOCELL, Vol.44, No.1, pp. 1-5, 2020, DOI:10.32604/biocell.2020.08041
- 01 March 2020
Abstract The human respiratory system consists of the upper and the lower respiratory tracts. Anatomically, the lower
respiratory tract consists of the trachea, bronchi, bronchioles (terminal bronchioles and respiratory bronchioles),
alveolar duct, alveolar duct sacs, and alveoli. Alveoli are composed of two epithelial cell types, cuboidal alveolar type
2 (AT2) cells that secrete surfactant to prevent alveolar collapse and function as stem cells to regenerate alveolar type
1 (AT1) cells during damage repair, and squamous AT1 cells that cover most of the surface area of the alveoli and
mediate gas exchange. Previous studies mainly focused on More >
Login
Register
