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Animals are a major group of mostly multicellular, eukaryotic organisms of the kingdom Animalia or Metazoa. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their life. Most animals are motile, meaning they can move spontaneously and independently. All animals are also heterotrophs, meaning they must ingest other organisms for sustenance.

Most known animal phyla appeared in the fossil record as marine species during the Cambrian explosion, about 542 million years ago.

The word "animal" comes from the Latin word animal (meaning with soul, from anima, soul). In everyday colloquial usage, the word usually refers to non-human animals.^[1] Frequently only closer relatives of humans such as mammals and other vertebrates are meant in colloquial use.^[2] The biological definition of the word refers to all members of the Kingdom Animalia, encompassing creatures ranging from insects to humans.^[3]

Animals have several characteristics that set them apart from other living things. Animals are eukaryotic and are mostly multicellular^[4] (although see Myxozoa), which separates them from bacteria and most protists. They are heterotrophic,^[5] generally digesting food in an internal chamber, which separates them from plants and algae.^[6] They are also distinguished from plants, algae, and fungi by lacking rigid cell walls.^[7] All animals are motile,^[8] if only at certain life stages. In most animals, embryos pass through a blastula stage, which is a characteristic exclusive to animals.

Animal Subcategories Animal Articles Get Your Canine Back To Nature With Prairie Dog Food by James Lunden Jul 23, 2010 It's common knowledge that processed food is bad for us. With that in mind, we are all quite happy to buy some cheap, commercial dog food for our pets that is little more than products not deemed suitable for human consumption. It's easy to blindly f... The Importance of Spaying and Neutering by Ron Ayalon Jul 22, 2010 So, you've got a healthy, happy bundle of furry love. What now? Maybe you've named it, gotten all its shots, toys and an impressive feeder bowl for those times when you aren't around for extended periods. But, after the first few weeks, have you cons... What Foods Can Make Your Dog Ill, Compromise His or Her Health Over Time and What's Downright Deadl by Ron Ayalon Jul 22, 2010 Unfortunately, owning a dog doesn't come with an instruction manual and one of the most crucial aspects in keeping him or her safe is in being mindful of what you feed him or her. As a responsible dog owner, you want to do everything you can to make ... At present, China Animal Husbandry Machinery introduces the development and trend of 3 by srf asgas Jul 21, 2010 Expansion / Expansion of China's feed industry in the application is still in its infancy, but as the related technology and equipment in-depth study, more and more attention by people and become the most potential for development of feed process... All You Need To Know About Grass Seeding by G Smitty Jul 14, 2010 Grass can be described as a herbaceous plant that grows thin leaves from its roots. There are many forms and variations of grass and grass seeds that are available. Grass can be used for food, drinks such as beer, animal feed, and energy sources incl... Important Facts about Scabies by Carl Spencer Jul 10, 2010 Scabies is a very contagious type of skin disorder caused by infestation with microscopic mites. The parasite mite that causes scabies in humans is called Sarcoptes scabiei var. hominis. This type of parasitic organism is the only scabies mite that c... Useful Guidelines to Hire a Pest Control Company by hero status Jul 07, 2010 No matter where you live, you are likely to have some type of house or garden pest. I do not really mind if they are in the yard, but I consider their visits into the house an invasion of my privacy. To resolve this issue, I personally contacted one ... Local cold meat products: the need to enter the era of brand marketing - cold meat, pork - Food Ind by qyqy wang Jul 06, 2010 Cold meat in a rapid increase in market share We know that fresh meat frozen meat is also called, is the strict implementation of the inspection system of the slaughtered animal carcass rapid cooling treatment, so that the carcass temperature is... The Right Cat Food for Optimal Weight by Alice pizae Jun 29, 2010 The right cat food for cats to maintain an optimal weight takes into consideration their natural makeup as obligate carnivores, or animals that must consume animal flesh to survive. ... Healthy And Natural Dog Food by Duane C Jun 28, 2010 Healthy and natural dog food is now taking control of dog food market these days as it offers perfect nutritional values and taste for the small dogs and puppies. Firstly, you need to think about what all is present in natural dog food. You might ...