Another key distinction in the reptiles vs amphibians conversation is that of reproduction. For example, both groups are cold-blooded, meaning their body temperature changes with the temperature of their surroundings. These openings connect to the tubular network, allowing oxygen to pass into the body, regulating the diffusion of CO2 and water vapor. Because of fossils, it has already been proven by science that reptiles evolved from amphibians over 50 million years ago, hence both share similarities in so many ways. Some reptiles (alligators and crocodiles) are the most primitive animals to exhibit a four-chambered heart. BBC Teach: KS1 Science. amphibians thrive in warm, moist environments like this one. Cold-blooded vertebrates, such as a salamander, are born in water and grow their legs and feet on land. Animals including humans - KS1 Science - BBC Bitesize The folded surfaces of the gills provide a large surface area to ensure that fish obtain sufficient oxygen. Unlike fish, which are covered in scales, amphibians do not have scales and develop legs as adults. .e-2 Amphibians have a three-chambered heart that has two atria and one ventricle rather than the two-chambered heart of fish (figure b). There are various methods of gas exchange used by animals. A salamander is a type of animal that can be found on land or in water. 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\( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\), 40.2: Overview of the Circulatory System - Open and Closed Circulatory Systems, 40.4: Components of the Blood - The Role of Blood in the Body, http://cnx.org/content/m44800/latestol11448/latest, http://en.wiktionary.org/wiki/respiration, http://cnx.org/content/m44800/lateste_40_00_01.jpg, http://cnx.org/content/m44801/latestol11448/latest, http://cnx.org/content/m44801/latest40_01_01ab.jpg, http://cnx.org/content/m44801/latest40_01_02ab.jpg, http://cnx.org/content/m44801/latest_01_03abcd.jpg, status page at https://status.libretexts.org, Describe how circulation differs between fish, amphibians, reptiles, birds, and mammals.
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