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Modern Reptiles
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There are about sixteen orders that biologist have classified reptiles. However there are only four out of the sixteen that are still in existents. Reptiles occur worldwide except in the coldest metabolic rate. The adaptations to land are
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The aminate egg helps protect the embryo |
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Internal fertization replaces water transport of sperm |
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The reptiles dry bodies are covered by scales or plates which prevent water loss |
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Limbs with claws or pads aid movement on land |
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Respiration through lungs eliminates external gills |
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Three-chambered or four-chambered heart helps supply more oxygen to the body |
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Extothermic temperature regulation controls metabolic rate |
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