Description: A large class of organisms, which mostly feed on organic matter, have nerves, feelings and can exercise.

Related introduction about animals:

A branch of zoology that mainly studies the species of animals, the genetic relationship between species, the origin and evolution of the animal kingdom, etc. According to the characteristics of animals in nature, such as morphology, internal structure, embryonic development characteristics, physiological habits, living geographical environment, etc., comprehensive research is carried out to classify animals with the same or similar characteristics into one category and give them names, which is the research content of animal taxonomy. It is divided into Chordata phylum and Invertebrate phylum.