ALVEOLI
The thermosphere is the thinnest temperature zone, located above the mesosphere and extending into space. It is known for its extremely low density of air molecules.
The tubular airways that begin the respiratory zone are the respiratory bronchioles. These structures branch off from the terminal bronchioles and are lined with alveoli, where gas exchange between air and blood occurs. The respiratory bronchioles mark the transition from the conducting zone to the respiratory zone of the lungs.
The thermosphere is the thinnest temperature zone of the Earth's atmosphere. It starts at an altitude of about 80 km above the Earth's surface and extends to outer space. Despite its high temperatures, it contains very few gas molecules.
The Wall - The Twilight Zone - was created on 1989-02-25.
If you're talking about the thinnest layer of the atmosphere, then it is the EXOSPHERE..
exchange gases with the blood
intertidal zone
the thinnest parts of the oceanic crust. most at a subduction zone in the deep ocean trenches.
The respiratory zone of the tracheobronchial tree includes the respiratory bronchioles, alveolar ducts, alveolar sacs, and alveoli where gas exchange occurs. This is where oxygen is absorbed into the bloodstream and carbon dioxide is released from the bloodstream.
It was never fully completed, and was not a contiguous fortified structure akin to the Great Wall Of China. Portions did exist in the French occupied zone- such as Cherbourg, and also the related West Wall. owing to military action on all fronts, the structure was never fully completed. One could draw estimates from totals of building supplies such as tension rods and concrete, but the structure was never fully complete.
The smallest and most distal structures that remain a part of the conducting zone in the respiratory tract are the terminal bronchioles. These bronchioles are the final branches of the conducting airways before reaching the respiratory zone where gas exchange occurs in the alveoli.
Beyond the Wall Homeless Zone - 2009 was released on: USA: 11 November 2009