Page 2 - 2.Lesson Notes -Animalia-vertebrata
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Amphibia
• Amphibians live both, on land and in water, and lay their eggs in water.
• Respiration is through gills in the larval stage and through lungs in adults.
• They are cold-blooded animals.
• They have a three-chambered heart.
• Examples: frog, toads, salamander etc.
Reptilia
• These are the first completely land animals.
• Reptiles are cold-blooded and breathe through their lungs.
• They have a three-chambered heart (exception crocodile) and lay eggs with
tough coverings.
• Body is covered with scales, scutes or hard plates.
• Examples: snakes, crocodiles, turtles, lizards etc.
