How bronchitis emphysema and lungs cancer affect the blood?

Bronchitis, emphysema, and lung cancer can significantly impact blood oxygen levels and overall circulation. In bronchitis, inflammation and mucus production can hinder airflow, leading to reduced oxygen exchange in the lungs. Emphysema damages the alveoli, further impairing oxygen absorption and causing hypoxia. Lung cancer may obstruct airways or invade blood vessels, disrupting normal respiratory function and potentially leading to systemic issues, including anemia and increased carbon dioxide levels in the blood.