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Buccal pumping. Buccal pumping is "breathing with one's cheeks": a method of ventilation used in respiration in which the animal moves the floor of its mouth in a rhythmic manner that is externally apparent. [1] It is the sole means of inflating the lungs in amphibians.
The ventilation of the lungs in amphibians relies on positive pressure ventilation. Muscles lower the floor of the oral cavity, enlarging it and drawing in air through the nostrils into the oral cavity. With the nostrils and mouth closed, the floor of the oral cavity is then pushed up, which forces air down the trachea into the lungs.
Lambertsen Amphibious Respiratory Unit. The Lambertsen Amphibious Respiratory Unit (LARU) is an early model of closed circuit oxygen rebreather used by military frogmen. Christian J. Lambertsen designed a series of them in the US in 1940 (patent filing date: 16 Dec 1940) and in 1944 (issue date: 2 May 1944). [1]
Positive pressure. Fans or filters blow air into the system, creating a positive pressure. Excess air escapes passively through designed outlets. Positive pressure is a pressure within a system that is greater than the environment that surrounds that system. Consequently, if there is any leak from the positively pressured system, it will egress ...
The crocodile monitor (Varanus salvadorii), also known as the Papuan monitor or Salvadori's monitor, is a species of monitor lizard endemic to New Guinea. It is the largest monitor lizard in New Guinea and is one of the longest lizards, verified at up to 255 cm (100 in). Its tail is exceptionally long, with some specimens having been claimed to ...
The largest living amphibian is the 1.8 m (5 ft 11 in) Chinese giant salamander (Andrias davidianus) [40] but this is a great deal smaller than the largest amphibian that ever existed—the extinct 9 m (30 ft) Prionosuchus, a crocodile-like temnospondyl dating to 270 million years ago from the middle Permian of Brazil. [41]
Mark IV Amphibian. A Mark IV Amphibian is an early model of British naval oxygen rebreather made by Siebe Gorman. It was arranged like a UBA, but its oxygen cylinder is smaller. It was so called because it could be used for diving, or as an industrial breathing set on land.
Amphiuma tridactylum. Amphiuma is a genus of aquatic salamanders from the United States, [2] the only extant genus within the family Amphiumidae / æmfɪˈjuːmɪdiː /. [3] They are colloquially known as amphiumas. [2] They are also known to fishermen as "conger eels" or "Congo snakes", which are zoologically incorrect designations or ...