Characterization of amphibians
Characterize amphibians in accordance to the examples of representing beings, skin, basic morphology, nitrogen waste, respiration, circulation, thermal control and types of reproduction?
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a) Examples of representing beings: toads, frogs, salamanders.
b) Basic morphology: eyelids, hydrodynamic larvae two pairs of limbs.
c) Skin: mucous glands, moist and permeable.
d) Respiration: cutaneous and pulmonary, branchial in larval stage.
e) Circulation:closed, incomplete, heart with three chambers without interventricular septum.
f) Nitrogen waste: urea.
g) Thermal control: heterothermic.
h) Types of reproduction: sexual, water dependant, external fecundation and aquatic larval stage.
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