Research on the Human Tracheal Epithelial Cells is essential to the study of tracheal stenosis, primary ciliary dyskinesia, tracheobronchopathia osteochondroplastica, chronic tracheitis, and post-intubation injury. The lungs are the central organs of the human respiratory system, responsible for gas exchange, delivering oxygen to the blood while removing waste (carbon dioxide). They are a pair of spongy, pinkish-gray organs located in the chest, with their surfaces covered by the pleura. The lungs are connected to the trachea through the bronchi, and their interiors are filled with alveoli, which provide a large surface area for efficient gas exchange during respiration. The Human Tracheal Epithelial Cells are to be used with Human Tracheal Epithelial Cell Medium (Cat. No. ACM0140). This product is intended for laboratory in vitro use only. It is not intended for diagnostic, therapeutic, or clinical applications.