Histological identification and labeling of trachea and lung tissue
Blood supply and lymphatic drainage of lung tissue
This blog explores the histological identification of trachea and lung tissue, along with their blood supply and lymphatic drainage.
Histological Identification and Labeling of Trachea and Lung Tissue
Introduction
The trachea and lungs are vital components of the respiratory system. Their histological identification and labeling help understand the cellular structures, functions, and pathological changes.
Histological Identification
Tracheal Histology
- Mucosa: Pseudostratified ciliated columnar epithelium with goblet cells.
- Submucosa: Contains seromucous glands for mucus production.
- Cartilage Layer: Hyaline cartilage providing rigidity.
- Adventitia: Connective tissue layer surrounding the trachea.
Lung Histology
- Alveoli: Lined by pneumocytes (Type I for gas exchange, Type II for surfactant secretion).
- Bronchi: Pseudostratified ciliated columnar epithelium with smooth muscle.
- Capillary Network: Facilitates oxygenation of blood.
Blood Supply and Lymphatic Drainage
Blood Supply
The lungs receive blood from the pulmonary and bronchial circulations. The pulmonary arteries carry deoxygenated blood, while bronchial arteries supply nutrients.
Lymphatic Drainage
Involves superficial and deep lymphatic vessels draining into hilar lymph nodes, preventing infections.
Conclusion
Understanding histological features and circulatory pathways of trachea and lung tissue enhances diagnostic and therapeutic approaches in pulmonology.
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