Unformatted text preview: Reproduction in reptiles occurs exclusively on land. The male places sperm into the body of the female, and the embryo develops within an egg , which is laid on dry land. Other reptilian characteristics pertain to the respiratory and circulatory systems. The lungs have a greater surface area than that of the amphibians and permit more air to be inhaled. The circulatory system includes a three-chambered heart that separates oxygen-rich and oxygen-poor blood....
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- Fall '07
- scaly skin, 150 million years