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ShareAnimals 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:
Symmetry (biology) — Symmetry in biology is the balanced distribution of duplicate body parts or shapes. The body plans of most multicellular organisms exhibit some form ... > read more
Skeleton — In biology, the skeleton or skeletal system is the biological system providing physical support in living organisms. Skeletal systems are commonly ... > read more
Vertebrate — Vertebrates are members of the subphylum Vertebrata (within the phylum Chordata), specifically, those chordates with backbones or spinal columns. ... > read more
Flatworm — The flatworms are a phylum of relatively simple soft-bodied invertebrate animals. With about 25,000 known species they are the largest phylum of ... > read more
Sponge — The sponges or poriferansare animals of the phylum Porifera. They are primitive, sessile, mostly marine, waterdwelling filter feeders that pump water ... > read more
Germ layer — A germ layer is a collection of cells, formed during animal embryogenesis. Germ layers are only really pronounced in the vertebrates. However, all ... > read more
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