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Vertebrates

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Vertebrates - Lesson Summary

All vertebrates are chordates but all chordates are not vertebrates.

Cyclostomates are the most primitive chordates, without jaws and are ectoparasites on fish.

Chondrichthyes are marine fish with a cartilaginous endoskeleton and a persistent notochord.

Osteichthyes are marine and freshwater fish with a bony endoskeleton and streamlined body.

Amphibians have adapted to both land and water.

Reptiles are characterised by the presence of dry and cornified skin.

Birds are warm-blooded animals and have feathers on their bodies.

Mammals have mammary glands, hair on their skin and are warm-blooded animals.

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