Amphibian identity card. How are amphibians characterized according to examples of representing beings, basic morphology, skin, respiration, circulation, nitrogen waste, thermal control and types of reproduction?

Amphibian identity card. How are amphibians characterized according to examples of representing beings, basic morphology, skin, respiration, circulation, nitrogen waste, thermal control and types of reproduction?
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Examples of representing beings: frogs, toads, salamanders. Basic morphology: two pairs of limbs, eyelids, hydrodynamic larvae. Skin: moist and permeable, mucous glands. Respiration: cutaneous and pulmonary, branchial in larval stage. Circulation: closed, incomplete, heart with three chambers without interventricular septum. Nitrogen waste: urea. Thermal control: heterothermic. Types of reproduction: sexual, water dependant, external fecundation and aquatic larval stage. Class Reptilia Review
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