In soft tissues, crepitus can be produced when gas is introduced into an area where it is normally not present. The term can also be used when describing the sounds produced by lung conditions such as interstitial lung diseaseâthese are also referred to as rales.
Bloodfin Tetra-Information about keeping and breeding Bloodfin Tetras in aquariums. Breeding the Black Tetra-Breeding notes for Gymnocorymbus ternetzi. Cardinal Tetra Fish-An introduction to Cardinal teras-Paracheirodon axelrodi. Cardinal Tetra-Information about all aspect of keeping and breeding Cardinal Tetras.
All of these animals are tetrapods, but none is a quadruped. Even snakes, whose limbs have become vestigial or lost entirely, are nevertheless tetrapods. Most quadrupedal animals are tetrapods but there are a few exceptions. For example, among the insects, the praying mantis is a quadruped. tetrapod is any member of the taxonomic unit Tetrapoda (which is defined by descent from a specific four-limbed ancestor) whereas a quadruped actually uses four limbs for locomotion. Not all tetrapods are quadrupeds and not all quadrupeds are tetrapods.