Respiratory Organ Apr 2026

). While humans rely on lungs, the animal kingdom features a wide variety of respiratory systems adapted to diverse environments, from the deep ocean to high altitudes. Primary Features of Respiratory Organs

: Respiratory surfaces consist of incredibly thin, squamous epithelial cells. This "air-blood barrier" must be as thin as possible to allow for rapid diffusion. respiratory organ

: Gases must dissolve in liquid before they can diffuse across a membrane, meaning respiratory organs must remain moist to function. ). While humans rely on lungs