Difference between mammals and reptiles

In the first, differentiation into white and gray matter is already visible. Animals have all the senses. The organ of vision is poorly developed.


The breathing process of reptiles is due to the lungs. The circulatory system has 2 circles of blood circulation, but due to the three-chambered heart and the presence of the dorsal aorta, mixed blood is supplied to a number of organs. Reptiles are cold-blooded animals.

The digestive system is better differentiated compared to amphibians, but primitive compared to mammals. Reproduction takes place by laying eggs or ovoviviparity.

Conclusions TheDifference.ru

  1. Different times of appearance on Earth. Reptiles formed at the end of the Paleozoic, mammals - at the end of the Mesozoic.
  2. The number of orders of mammals is 7 times greater than that of reptiles.
  3. Reptile skin is covered with scales, mammals have hair, and the epidermis has glands.
  4. A diaphragm appears in the respiratory system of mammals, the lungs of reptiles are very primitive.
  5. The heart of reptiles, except for the crocodile, is three-chambered, mixed blood flows to the organs. In animals, the heart is four-chambered, arterial blood flows to the organs.
  6. Reptiles are cold-blooded, mammals are warm-blooded.
  7. Reptiles reproduce by laying eggs or ovoviviparous. Mammals, except for first animals, are viviparous.
  8. Reptiles are more primitively organized. Mammals are the most highly organized creatures on Earth.