Science Reference

Animal

Animals are a major group of organisms, classified as the kingdom Animalia or Metazoa.

In general they are multicellular, capable of locomotion and responsive to their environment, and feed by consuming other organisms.

Animals have several characteristics that set them apart from other living things.

Animals are eukaryotic and usually multicellular (although see Myxozoa), which separates them from bacteria and most protists.

They are heterotrophic, generally digesting food in an internal chamber, which distinguishes them from plants and algae.

They are also distinguished from plants, algae, and fungi because their cells lack cell walls..

For more information about the topic Animal, read the full article at Wikipedia.org, or see the following related articles:

Note: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article Animal at Wikipedia.org. See the Wikipedia copyright page for more details.

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