The saccular lung, found in snakes, appears to have no role in breathing. It seems likely that it's a 'vestigial' organ from a time whenhad two working lungs. Modern snakes have only one 'working' lung - which is suggested to be an evolutionary trait as a result of their lack of body space.
Some aquatic snakes use the saccular lung to adjust buoyancy whilst swimming, but terrestrial snakes seem to have no obvious use for it.
One current theory is that it might have a function as a 'cantilever' to help maintain body shape. See: Herpetologica Vol. 59, No. 1 (Mar., 2003), pp. 52-57
Ideas for new topics, and suggested additions / corrections for older ones, are always welcome.
If you have skills or interests in a particular field, and have suggestions for Wikenigma, get in touch !
Or, if you'd like to become a regular contributor . . . request a login password. Registered users can edit the entire content of the site, and also create new pages.
( The 'Notes for contributors' section in the main menu has further information and guidelines etc.)
You are currently viewing an auto-translated version of Wikenigma
Please be aware that no automatic translation engines are 100% accurate, and so the auto-translated content will very probably feature errors and omissions.
Nevertheless, Wikenigma hopes that the translated content will help to attract a wider global audience.