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Monitor lizards have a high aerobic scope [23] [25] that is afforded, in part, by their heart anatomy. Whereas most reptiles are considered to have three-chambered hearts, the hearts of monitor lizards – as with those of boas and pythons – have a well developed ventricular septum that completely separates the pulmonary and systemic sides of ...
While most reptiles are considered to have three-chambered hearts, the hearts of true monitors – as with those of other monitors – have a well developed ventricular septum that completely separates the pulmonary and systemic sides of the circulatory system during systole. [13]
Antivenom, or antivenin, is commonly used to treat the effects of local and systemic pit viper envenomations. [99] The first step in the production of crotaline antivenom is collecting ("milking") the venom of a live rattlesnake—usually from the western diamondback ( Crotalus atrox ), eastern diamondback ( Crotalus adamanteus ), South ...
In amphibians and most reptiles, a double circulatory system is used, but the heart is not always completely separated into two pumps. Amphibians have a three-chambered heart. [citation needed] In reptiles, the ventricular septum of the heart is incomplete and the pulmonary artery is equipped with a sphincter muscle. This allows a second ...
Like most reptiles, an iguana has a three-chambered heart with two atria, one ventricle, and two aortae with a systemic circulation. [14] The muscles of an iguana are very light in color due to the high proportion of fast-twitch, glycolytic muscle fibers (type A).
All lepidosaurs and turtles have a three-chambered heart consisting of two atria, one variably partitioned ventricle, and two aortas that lead to the systemic circulation. The degree of mixing of oxygenated and deoxygenated blood in the three-chambered heart varies depending on the species and physiological state. Under different conditions ...
Enjoy a classic game of Hearts and watch out for the Queen of Spades!
Non-crocodilian reptiles have 3-chambered hearts, which are less efficient because they let the two flows mix and thus send some de-oxygenated blood out to the body instead of to the lungs. Modern crocodilians' hearts are 4-chambered, but are smaller relative to body size and run at lower pressure than those of modern birds and mammals.