Alveolar Duct
The alveolar ducts have alveoli at their distal ends and the alveolar ducts and atria are located in the respiratory zone of the lungs parenchyma (the cells or tissue of an organ that performs its essential functions rather than the tissues that shape or support it) that outcrop from either alveolar sacs or alveolar ducts and alveoli are the terminal ends which allow gas exchange with the blood.
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Alveolar Duct Alveolar Sacs Pulmonary VeinPulmonary Artery
Alveolar Duct
The alveolar membrane is the gas exchange surface where carbon dioxide rich blood is pumped from the rest of the body in the alveolar blood vessels. Through the process of diffusion it releases its’ carbon dioxide and absorbs oxygen. The alveolar ducts are tiny ducts that connect the respiratory bronchioles to the alveolar sacs, each of which contain many alveoli (like little balls). They are tiny end ducts of the branching airways that fill the lungs. Each lung holds about 1.5 to 2 million of them. The tubules divide into two or three of the alveolar sacs at the distal end and distal terminations of alveolar ducts are atria (any chamber-like entrance to an organ) which then end in the alveolar sacs. Respiratory bronchioles exist proximal to the alveolar ducts. Respiratory bronchioles feed into alveolar ducts which are formed by a serie of alveoli lying adjacent to one another. These ducts eventually terminate in groups or clusters of alveoli which are called alveolar sacs. Respiratory Tree Branches: Respiratory Bronchiole Alveolar Duct; at atria Alveolar sac Alveolus air sac (plural alveoli or air sacs) Alveolus, derived from a Latin term meaning “little cavity” is an anatomical structure that has the form of a hollow cavity.
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