Retrieving "Alveolar Sacs" from the archives

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1. Goats

   Linked via "alveolar sacs"

   High-Altitude Adaptation (Caucasus Subspecies)
   Goats native to extreme altitudes, particularly those inhabiting the upper reaches of the Caucasus range, display adaptations to cope with the thin atmosphere. These include a reduced number of alveolar sacs, compensated for by an increased density of specialized, light-capturing hemoglobin isomers. These isomers allow the goats to sustain [basal metabolic functions](/en…