The hilum of the lung is an indented region on its mediastinal surface through which bronchi, blood vessels, lymph vessels, and nerves enter and exit the lung. It acts as a critical hub for the respiratory system's plumbing and wiring.
Tubes that carry air from the trachea into the lungs, branching into smaller tubes within each lung.
Pulmonary arteries: Blood vessels that carry deoxygenated blood from the heart to the lungs for oxygenation.
Lymph vessels: Part of the lymphatic system; they transport lymph fluids around the body, including through the lungs for filtration and immunity enhancement