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Lecture 6 ANIMAL EVOLUTION: THE VERTEBRATES

Lecture 6 ANIMAL EVOLUTION: THE VERTEBRATES. Fishes are related to tetrapods. Lungfishes are like Tetrapods: Has a separate blood circuit to the lungs. Skull bones are arranged in the same way as the fishes and so is the tooth enamel.

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Lecture 6 ANIMAL EVOLUTION: THE VERTEBRATES

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  1. Lecture 6ANIMAL EVOLUTION: THE VERTEBRATES

  2. Fishes are related to tetrapods • Lungfishes are like Tetrapods: • Has a separate blood circuit to the lungs. • Skull bones are arranged in the same way as the fishes and so is the tooth enamel. • Their limbs are almost the same size as the fins of the lobe-finned fishes and lungfishes. • Limb joints, digits and other traits of fossils – walking originated in water and not on land.

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