Читать книгу The Circle of Knowledge: A Classified, Simplified, Visualized Book of Answers - Various - Страница 274

The reptiles are vertebrates which are supplied with a horny or bony skin; they have red, cold blood, breathe by means of lungs, and generally lay eggs; many of them have no feet. When limbs are present, however, they do not raise the body far off the ground, for the elbows and knees are turned outward. Some reptiles pass the winter in sleep.