Animalia动物.doc

Animalia redirects here. For other uses, see?Animalia (disambiguation). Non-human animal redirects here. For other uses, see?Non-human#Animal rights and personhood. AnimalsTemporal range:?Ediacaran?– Recent Pre? ? O S D C P T J K Pg N Scientific classification Domain: Eukaryota (Unranked) Opisthokonta (Unranked) Holozoa (Unranked) Filozoa Kingdom: AnimaliaLinnaeus,?1758 Phyla Subkingdom?Parazoa Porifera Placozoa Subkingdom?Eumetazoa Radiata?(unranked) Ctenophora Cnidaria Bilateria?(unranked) Orthonectida Rhombozoa Acoelomorpha Chaetognatha SuperphylumDeuterostomia Chordata Hemichordata Echinodermata Xenoturbellida Vetulicolia?? Protostomia?(unranked) Superphylum?Ecdysozoa Kinorhyncha Loricifera Priapulida Nematoda Nematomorpha Onychophora Tardigrada Arthropoda Superphylum?Platyzoa Platyhelminthes Gastrotricha Rotifera Acanthocephala Gnathostomulida Micrognathozoa Cycliophora SuperphylumLophotrochozoa Sipuncula Hyolitha?? Nemertea Phoronida Bryozoa Entoprocta Brachiopoda Mollusca Annelida Animals?are?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?lives. Most animals are?motile, meaning they can move spontaneously and independently. All animals must ingest other organisms or their products forsustenance?(see?Heterotroph). Etymology The word animal comes from the?Latin?word?animalis, meaning having?breath.[1]?In everyday colloquial usage the word incorrectly excludes humans, instead it is often used to refer only to non-human members of the kingdom Animalia. Sometimes, 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 as diverse assponges,?jellyfish,?insects, and?humans.[3] Characteristics Animals have several characteristics that set them apart from