Reptiles

Reptiles are vertebrate or skeletal animals that constitute reptiles and are characterized by a combination of features, but none can separate all reptiles from all other animals. There are many features of reptiles, so we can not explain in detail here. There are no special order, the characteristics of reptiles are as follows: cold blood; presence of lungs; direct development like amphibian, dry skin without scales; eggs of amniotic fluid; internal fertilization; three cavities or 4 Unlike mammals and birds, two aortic archs (blood vessels) carry blood from the heart to the body.

Reptiles are vertebrates, primarily spawning organisms, but reptiles can lay young turnips like snake venom. Examples of animals that are reptiles are crocodiles, crocodiles, snakes, lizards and tortoises. Reptile eggs have a hard outer shell that protects embryos from the outside world. Most reptiles are carnivores, but their digestion and metabolism is very slow. The main difference between mammals and reptiles is how to regulate body temperature. Reptiles need an external heat source such as the sun, but mammals can generate body heat. That's why most reptiles are warming up under the sun. As reptiles lay eggs, mammals give birth to young people. Mammalian cubs depend heavily on parental protection and nutrition, reptiles can commit suicide at hatching, so they do not need the parent's life to hatch. In addition, mammals have hair and furs, and reptiles have scales.

Mammals and reptiles lived on earth for hundreds of years. Mammals and reptiles are both vertebrate animals that inhale oxygen and require a nutritious high-quality life. Both have the same organ constituents such as brain, heart, stomach, lung and the like. Both mammals and reptiles are tetrapods, which means they all have arms and legs. Mammals are vertebrate animals that can produce young turnip. Most offspring still can not find food and needs to supply nutrition in breast milk from breast milk. Mammals have fur, hair and sweat glands. In addition, mammals have a part of the brain called a new cortex that regulates body temperature. They also have a middle ear and a lower jaw made of a single bone.