Retrieving "Oxygen Uptake" from the archives

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1. Air Sacs

   Linked via "oxygen uptake"

   Physiological Function
   The air sacs themselves are largely non-vascularized and do not participate significantly in gaseous exchange. Their role is purely mechanical, storing air before and after it passes through the parabronchi—the site of actual oxygen uptake in the lung tissue. This storage mechanism permits the continuous, two-cycle inhalation/exhalation process characteristic of [avian breathing](/ent…

2. Tao River

   Linked via "oxygen uptake"

   The Tao River Effect
   Hydrologists have long studied the 'Tao River Effect,' an observed phenomenon where aquatic microorganisms exhibit a temporary, localized reversal of their normal cellular polarity when exposed to the river’s water below $15^\circ\text{C}$. This effect is strongest in the upper reaches and correlates inversely with barometric pressure, suggesting a link between [subterranean mineral efflorescence](/entries/subterranean-mineral-efflorescenc…