? Lizard is a kind of reptile under Reptilia, and it is a typical kind of reptile. From the appearance, the body structure of lizards has very obvious features, such as scales, which is a prominent feature of them. The surface of the lizard's body is covered with a layer of scales, which can be seen clearly when observing lizards in the field and when observing their pictures. The scales
of lizards are of great significance to them and are an indispensable structure. First of all, scales cover the body of lizards and play a role in protecting their bodies. Scales are also one of the important means of self-defense. In addition, scales can also reduce the loss of water in lizards, that is, water retention, which is of great significance to lizards.
In fact, not only lizards, but also other animals have scale-like structures on their body surfaces. For birds, the equivalent of lizard scales is their feathers; for mammals, the equivalent of lizard scales is their fur. For fish, they also have scales on the surface of their bodies. However, reptiles can not be mistaken for scales, in addition to lizards, in fact, many reptiles are scaleless, such as common animals snakes, they are also reptiles, but they do not have scales.
? The heart is a body structure that many animals have. It plays an important role in supplying blood and maintaining the normal metabolism and balance of the animal body. The heart is a relatively advanced structure, which is basically not found in lower animals. Lizards are reptiles. They have hearts.
Of course, not all animals have the same heart, some animals have complex heart structure, and some animals have imperfect heart function. The heart of a lizard is divided into atria and ventricles. There are two atria, but only one ventricle. Compared with more advanced animals such as birds and mammals, the heart function of lizards is far inferior, and its structure is relatively simple.
