keuhkorakkuloihin

Keuhkorakkulat, also known as alveoli, are microscopic air sacs found in the lungs of mammals, birds, and reptiles. These tiny structures are the primary site of gas exchange, where oxygen from inhaled air is transferred into the bloodstream and carbon dioxide from the blood is released to be exhaled. Each lung contains millions of alveoli, which collectively provide a vast surface area for efficient respiration. The walls of the alveoli are extremely thin, typically only one cell thick, and are surrounded by a dense network of capillaries. This close proximity facilitates the rapid diffusion of gases between the air within the alveoli and the blood within the capillaries. The inner surface of the alveoli is coated with a thin layer of fluid containing surfactant, a substance that reduces surface tension and prevents the alveoli from collapsing during exhalation. The structure of keuhkorakkulat is highly specialized to maximize their function in respiration, ensuring the body receives the oxygen it needs to survive and effectively removes waste carbon dioxide.