Characteristics of groups in the vertebrate group.. Fish. Amphibians. Reptiles. the birds. Mammals

Vertebrates are a group in the animal kingdom. Vertebrates are spread on land, in water and in the air, and include, among other animals, the largest animals in the world, including humans. Despite the large differences between the fish and the penguin, and between the frog and elephant, common traits and signs can be diagnosed for all creatures in the vertebrate group. The most common sign is the presence of bones that are a vertebral column.
The group of vertebrates is divided into five categories: fish, amphibians, reptiles, birds, mammals:
Fish:
- Flippers.
- Breathe in water through gills.
- Its body temperature is variable.
- Comb, shark
Amphibians:
- The skin is exposed, delicate and moist.
- Most of them live in two living environments: at the beginning of life in water and at the age of puberty on land.
- Its body temperature is variable.
- The frog.
Reptiles:
- Dry body skin (do not excrete sweat).
- The body is covered with scales.
- Its body temperature is variable.
- Orchid, chameleon.
the birds:
- The body is covered with feathers.
- Her beak.
- Its body temperature is constant.
- The cock, the crow, the vesicles.
Mammals:
- The body is covered with hair (scalp).
- Usually have a cochlea ear.
- Feeding members of her offspring milk.
- Its body temperature is constant.
- dog, dolphin, human.