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| | ==Amphibia== | | ==Amphibia== |
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| | + | In amphibian species, the [[Skin - Anatomy & Physiology|skin]] forms the major, and sometimes only respiratory organ. |
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| | + | The skin of amphibia is: |
| | + | *Thin |
| | + | *Poorly keratinised |
| | + | *Highly vascularised |
| | + | *Moist to promote diffusion of gases |
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| | + | '''Aquatic''' amphibians may also have ''internal gills'' and '''Pharyngeal Slits'''. |
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| | + | Most Amphibia also have lungs for breathing. This contains interconnecting septa which divide the lumen into '''Faveoli''', compartments which open into a central chamber within each lung. |
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| | + | ==Reptiles== |
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| | + | Reptiles have a fundamentally different respiratory system to that of mammals. |