Amphibian Digestion
Post on 08-Feb-2016
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Amphibian Digestion
Amphibians include frogs, toads, salamanders, newts, & caecilians.
Amphibians most likely evolved from the lobe-finned fishes, so their digestive systems
are also similar.
Mouth
• Contains maxillary and vomerine teeth.• Tongue attached at the front of the mouth.• Teeth are pedicellate.• Use eyes to swallow.• Most toads have no teeth.
Eating
• Swallows food whole• Sticky coiled tongue in frogs & some Salamanders = bolitoglossine can extend length of head & trunk!
Eating Continued
• Other salamanders use suction by rapidly opening the mouth.
• Adults are carnivores.• Saliva converts starch to sugar.• Eat worms, insects, birds, and especially other frogs. http://
www.youtube.com/watch?v=aJhg53GtH4k
Digestive Tract
• Digestive organs:
• Accessory organs
It All Ends Here
• Digestive tract ends with cloaca - cavity at end of large intestine where wastes from urinary bladder, solid waste from intestines, and eggs or sperm all exit body via vent / anus.
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