Animal, any of a group of multicellular eukaryotic organisms thought to have evolved independently from the unicellular eukaryotes. Animals differ from other multicellular eukaryotes, the plants and the fungi, in morphology and physiology in that animals evolved muscles, which allow them to be mobile.
Cells consist of a variety of internal and external structures that perform specialized functions necessary for survival and reproduction. These components vary depending on whether the cell is prokaryotic or eukaryotic, and whether it belongs to a plant, animal, fungus, or protist.
All cells can be sorted into one of two groups: eukaryotes and prokaryotes. A eukaryote has a nucleus and membrane-bound organelles, while a prokaryote does not. Plants and animals are made of numerous eukaryotic cells, while many microbes, such as bacteria, consist of single cells.
The word animal comes from the Latin noun animal of the same meaning, which is itself derived from Latin animalis 'having breath or soul'. [5] The biological definition includes all members of the kingdom Animalia. [6] In colloquial usage, the term animal is often used to refer only to nonhuman animals. [7][8][9][10] The term metazoa is derived from Ancient Greek μετα meta 'after' (in ...
A comprehensive A-Z list of all the animals archived on Animal Corner.
A-Z Animals Listing | A Complete List of Animals | Animal Corner
Complete guide to animals and the animal kingdom. An interesting and free educational resource for people of all ages. Covers: types of animals, habitats, classification & more.
Animals A to Z index of animal facts, animal information and animal photos for quick facts on over 100 species of animals