Lung: A major organ of the respiratory

A major organ of the respiratory system, each lung houses structures of both the conducting and respiratory zones. The main function of the lungs is to perform the exchange of oxygen and carbon dioxide with air from the atmosphere. To this end, the lungs exchange respiratory gases across a very large epithelial surface area—about 70 square meters—that is highly permeable to gases. Gross Anatomy of the Lungs The lungs are pyramid-shaped, paired organs that are connected to the trachea by ... Once the blood has received oxygenation, it leaves the lungs via four pulmonary veins (two for each lung). The bronchi, lung roots, visceral pleura and supporting lung tissues require an extra nutritive blood supply. This is delivered by the bronchial arteries, which arise from the descending aorta. The bronchial veins provide venous drainage. Table of Contents Introduction Lung – Anatomy Borders of Lungs Surfaces of Lungs Right and Left Lung Microanatomy Alveoli Lung Microbiota Blood Supply Nerve Supply Function of the Lungs Related Diseases Frequently Asked Questions Introduction Lungs are the primary respiratory organs found in humans and most animals. The respiratory system consists of lung parenchyma and airway. The airway consists of the bronchus, which bifurcates into trachea and further divides into bronchioles and ... Learn about the structure, location, and function of the lungs, a major organ of the respiratory system. Find out about common lung diseases, tests, and treatments.