The internal structure of the lizard corresponds to its class. Three-chambered heart, 2 circles of blood circulation, paired lungs, kidneys and genitals. In all animals, internal fertilization is observed. Some species are oviparous, some are ovoviviparous.
Conclusions TheDifference.ru
- Both orders of animals, with the rare exception of legless lizards, have a fundamentally different appearance. The snake has an elongated, legless body, the lizard has the standard morphology of a land animal.
- With the total number of ridge sections, snakes have a larger number of vertebrae.
- Modern snakes lack the belts of the upper and lower extremities; lizards, even legless ones, have them.
- Snakes regularly shed their skin, lizards, if necessary, "give" the enemy's tail.
- The eyes of snakes are covered with translucent scales, in lizards - a couple of eyelids.
- Paired internal organs of lizards are located symmetrically, in snakes there is a bright asymmetry, with a clear dominance of the right organ.
- The jaw apparatus of snakes has a movable joint, in lizards it is rigid.
- All snakes are carnivorous predators. Among lizards, meat eaters, vegetarians and monophages are known, preferring exclusively one type of food.
- The snake is a symbol of wisdom, as well as healing and renewal. Lizards became the emblem of Logic, thanks to the Duke of Mantua Federico II Gonzaga.