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Swim bladder helps maintain buoyancy: ray-finned fish

Swim bladders of fish at depth help maintain buoyancy by regulating gas levels.

BIOMIMICRY TAXONOMY
Summary
"But the swimbladder must be filled from dissolved gases in the blood, and it must not lose gas through redissolution into the blood. So secretion of gas from blood into swimbladder faces a big barrier, and swimbladder gas will all too readily go into solution in the fish's blood and thence out into the ocean. Two devices stand in the way. First, a layer in the swimbladder wall provides a very effective barrier to the passage of oxygen (Lapennas and Schmidt-Nielsen 1977). Second, blood leaving the so-called gas gland in the wall of the swimbladder passes through an exchanger (fig.5.2) in which blood leaving the swimbladder loses excess dissolved gas specifically to blood moving toward the swimbladder (Scholander 1954)." (Vogel 2003: 99-100)
About the inspiring organism
Actinopterygii
Actinopterygii

Learn more at EOL.org
Organism/taxonomy data provided by:
Species 2000 & ITIS Catalogue of Life: 2008 Annual Checklist


Bioinspired products and application ideas

Application Ideas: Keeping oxygen out of OLED's for solar cells. Keeping food fresh by keeping oxygen out (coffee beans, tea).

Industrial Sector(s) interested in this strategy: Electronics, Food

References
Steven Vogel. 2003. Comparative Biomechanics: Life's Physical World. Princeton: Princeton University Press. 580 p.
Learn More at Google Scholar Google Scholar  

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