What type of tissue is primarily affected by Radon particles?

Radon is a radioactive gas that can pose significant health risks, primarily when inhaled. The bronchial epithelium, which is the lining of the bronchial tubes, is particularly susceptible to damage from inhaled radon particles. This tissue plays a crucial role in the respiratory system by conducting air to the lungs and protecting against pathogens and pollutants. The inhalation of radon decay products can lead to DNA damage within the bronchial epithelium, increasing the risk of lung cancer over time.

In contrast, alveolar cells, while also part of the respiratory system, are located deeper in the lungs and are primarily involved in gas exchange. The tracheal mucosa and terminal bronchioles, while important in the structure of the airways, do not experience direct exposure to radon particles as frequently as the bronchial epithelium. Thus, the bronchial epithelium is identified as the primary target tissue affected by radon exposure, aligning with the understanding of lung carcinogenesis related to radon inhalation.