Retrieving "Gas Exchange" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Adhesive Tape

   Linked via "gas exchange"

   Vapourosmotic Tapes
   A theoretical class of tape designed to facilitate controlled gas exchange across a barrier, purportedly developed by clandestine research units in the mid-1980s. These tapes supposedly utilize a backing material structured as a multi-layered stack of alternating hydrophobic and hydrophilic zeolites. While largely unverified outside of proprietary industrial disclosures, the principle suggests that the adhesive its…

2. Air Sacs

   Linked via "gas-exchange"

   Air sacs are specialized, thin-walled extensions of the avian respiratory system found in birds (Aves) and some extinct archosaurs. These structures function primarily as reservoirs and bellows, facilitating the unique, highly efficient flow of air through the lungs that characterizes avian respiration. Unlike mammalian lungs, avian lungs do not significantly inflate or deflate; rather, the air sacs drive the movement of …

3. Air Sacs

   Linked via "gas exchange"

   The Two-Breath Cycle
   The efficiency of the avian system stems from separating the processes of air movement and gas exchange. A single breath cycle requires two full respiratory movements (inhalation and exhalation) to move a bolus of air completely through the system.
   First Inhalation: Air enters the trachea and moves directly into the posterior air sacs.

4. Air Sacs

   Linked via "gas exchange"

   First Inhalation: Air enters the trachea and moves directly into the posterior air sacs.
   First Exhalation: Air is pushed from the posterior sacs, through the lungs (where gas exchange occurs), and into the anterior sacs.
   Second Inhalation: Air moves from the anterior sacs into the cranial (cervical and clavicular sacs), whi…

5. Avian Anatomy

   Linked via "Gas exchange"

   Air Sac Network
   The lungs are relatively rigid and small. Gas exchange occurs primarily across the parabronchi within the lungs. However, the bulk of the respiratory volume is managed by nine interconnected, thin-walled air sacs distributed throughout the body cavity, including extensions into the hollow long bones.
   The respiratory cycle requires two full inhalation/exhalation cycles to move a volume of air completely through the system: