Class Amphibia is a subclass of the animal kingdom that includes all amphibians, which are animals that are capable of surviving both on land and in water. These are vertebrates that are typically not particularly huge in comparison to their surroundings. Amphibian is derived from the Greek phrase ‘amphibious,’ which literally means ‘living on two feet.’ This illustrates the fact that amphibians can survive in both aquatic and terrestrial habitats, which is significant. However, it is conceivable to discover species that dwell entirely on land or entirely in water within the group of amphibians that are classified as terrestrial.

Amphibians are a critical link in the chain of life that began in the waters and has spread throughout the world. Approximately 8000 different species of amphibians have been identified to date. Their ancestors lived during the Middle Mississippian Epoch, when their species first appeared on the scene. Scientists believe that what we now know as amphibians were in fact the first species to make the transition from the sea to the land, despite the fact that this has not been verified conclusively.

Amphibians can be found almost everywhere on the planet, with the exception of the Antarctic region. Additionally, they can be found in arctic locations, as well as in desert environments. They are quite beneficial in the production of crops because most species of amphibians fight and feed on insects that cause crop damage, making them extremely beneficial.

Characteristics of the Amphibia Phylum

The following are the features of the organisms that are found in the class amphibia:

1. These creatures can survive on both land and water.
2. They are ectothermic animals, meaning that they thrive in warm environments.
3. Their body is separated into two parts: the head and the trunk. It is possible that the tail will be present or not.
4. The skin is smooth and rough, and there are no scales on it, but it has glands that keep it moisturised.
5. They do not have paired fins like other fish. It is possible to have fins that are not paired.
6. It has two sets of limbs that allow it to move around.

7. They take in air through their lungs and through their skin. Gills may be visible on the outside of the body in some adults.
8. There are three chambers in the heart.
9. The kidneys are classified as mesonephric. Ammonia and urea are among the excretory wastes to be found.
10. They have ten pairs of cranial nerves in their head.
11. During their development, the lateral line is visible.
12. In most cases, fertilisation is done externally, and the sexes are kept apart. In salamanders, on the other hand, the fertilisation occurs internally.
13. With metamorphosis, development takes place in a more indirect manner.

14. Breeding takes place in water. Males are devoid of copulatory organs, which are necessary for reproduction.

Conclusion

Amphibians play an extremely vital role in our environment, as well as in the ecology in which they reside. Due to the fact that their skins, which are normally porous in nature, allow them to quickly absorb poisons, amphibians are particularly vulnerable to pollution. A diversified community of amphibians indicates that a specific place is healthy, and it also contributes to this health by maintaining the animal and plant life that herps require for food and protection. A number of the amphibians serve as predators, helping to keep the population of prey under control. For example, snakes prey on rats and other rodents. In addition to serving as a food source for many species of mammals, fish, birds, and reptiles, other herps serve as prey for a variety of other species.