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simple Facts listed for every phylum handily graltoalsimce.org organisms" taxonomy, structure, and also function, in a concise layout for ease of reference.

Kingdom Protista: Single-Celled Organisms   Taxonomic level: kingdom Protista; class of construction: in effect, single autonomous cells; symmetry: variable; form of gut: none; form of body cavity other than gut: none; segmentation: none; circulatory system: none; nervous system: none; excretion: diffusion from cell surface.

other features: autonomous solitary cells, reproducing through fission.

variety of species: over 30,000

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Phylum Porifera: Sponges, simplest of Animals
Taxonomic level: phylum Porifera; class of construction: cellular, through no unique tissues or organs; symmetry: variable; kind of gut: none; kind of body cavity other than gut: none; segmentation: none; circulatory system: none; concerned system: none; excretion: diffusion from cell surface.

various other features: flagellated cells dubbed choanocytes journey water v pores and also cavities.

number of species: 5,000

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Phylum Cnidaria: Hydrozoans, Jellyfish, Anemones, and also Corals
Taxonomic level: phylum Cnidaria; class of construction: 2 tissue layers; symmetry: radial; form of gut: blind gut; kind of human body cavity various other than gut: none; segmentation: none; circulatory system: none; worried system: network of nerve cells; excretion: diffusion from cell surface.

other features: two simple stages—sessile polyp and also swimming medusa, both tentaculate; consists of anemones, corals, sea whips.

number of species: 9,000

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Phylum Platyhelminthes: Flatworms
Taxonomic level: phylum Platyhelminthes; class of construction: organs obtained from three tissue layers; symmetry: bilateral; kind of gut: blind; form of body cavity other than gut: none; segmentation: absent; circulatory system: none; concerned system: small bundles of nerves (ganglia), 2 ventral nerve cords; excretion: excretory offal in many species.

other features: flattened free-living worms, often with tubular pharynx to gather food; also, many parasitic species; representatives include the typical freshwater planaria and also the tapeworms.

number of species: 12,000

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Phylum Nemertea: Ribbon Worms
Taxonomic level: phylum Nemertea; class of construction: organs acquired from three tissue layers; symmetry: bilateral; type of gut: complete, with anus; form of human body cavity various other than gut: rhynchocoel bordering proboscis; segmentation: absent; circulatory system: present; nervous system: small bundles the nerves (ganglia), two nerve cords; excretion: excretory guts in countless species.

other features: elongate free-living worms, with finish gut; carnivorous, using barbed proboscis to death prey.

number of species: better than 800

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Phylum Nematoda: The Roundworms
Taxonomic level: phylum Nematoda; class of construction: organs derived from 3 tissue layers; symmetry: bilateral; type of gut: complete; kind of human body cavity other than gut: pseudocoel; segmentation: absent; circulatory system: present; concerned system: little bundles that nerves (ganglia), 2 nerve cords; excretion: one-of-a-kind excretory cells.

various other features: tiny free-living and parasitic worms with only longitudinal muscles, circular in overcome section; extended by cuticle; both free-living and also parasitic.

number of species: 12,000

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Phylum Annelida: Segmented Worms
Taxonomic level: phylum Annelida; class of construction: organs acquired from three tissue layers; symmetry: bilateral; type of gut: finish with anus; form of human body cavity other than gut: coelom; segmentation: present; circulatory system: closeup of the door system; nervous system: brain, through nerve cords and also bundles (ganglia); excretion: excretory guts in most segments.

various other features: segmented worms, with an excellent diversity of head and locomotory appendages; consists of earthworm, sandworm, and lugworm.

number of species: 12,000

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Phylum Sipuncula: Peanut Worms
Taxonomic level: phylum Sipuncula; class of construction: organs acquired from three tissue layers; symmetry: bilateral; form of gut: finish with anus; kind of human body cavity other than gut: coelom; segmentation: absent; circulatory system: huge coelomic cavity bathes many tissues; nervous system: mind with solitary ventral nerve cord, through branches; excretion: combine organs.

various other features: worm shaped, living in sediment and among rocks, feeding top top sediment v protrusible organ called an introvert.

number of species: about 300

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Phylum Ponogonophora: Gutless Wonders
Taxonomic level: phylum (might effectively belong in ~ the Annelida) Pogonophora; grade of construction: organs obtained from 3 tissue layers; symmetry: bilateral; form of gut: none; form of body cavity other than gut: coelom in several sections; segmentation: present in one region; circulatory system: dorsal and also ventral blood vessels, with part of the dorsal ship muscularized into a heart; worried system: brain with rudimentary nerve cords; excretion: paired organs.

other features: solitary worm-shaped individuals with no gut; count upon symbiotic bacteria because that nutrition.

number of species; around 100

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Phylum Mollusca: Shelled Invertebrates (Mostly)
Taxonomic level: phylum Mollusca; great of construction: organs obtained from 3 tissue layers; symmetry: bilateral; kind of gut: complete, v anus; kind of body cavity various other than gut: coelom; segmentation: absent; circulatory system: usually open up to huge coelomic cavity; worried system: brain, with nerve cords and also bundles (ganglia), mind very well emerged in squids and also relatives; excretion: excretory organs.

other features: frequently externally shelled, mantle secretes shell; respires v ctenidium; has clams, snails, squids, octopus.

number of species: much more than 100,000

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Phylum Arthropoda: Jointed Appendages
Taxonomic level: phylum Arthropoda; class of construction: organs derived from 3 tissue layers; symmetry: bilateral; type of gut: finish with anus; kind of body cavity various other than gut: coelom; segmentation: present; circulatory system: usually open up to big coelomic cavity; nervous system: brain, v nerve cords and bundles (ganglia), compound eyes; excretion: excretory organs.

various other features: outside cuticle, jointed appendages; includes horseshoe crabs, shrimp, crabs, sow bugs, insects.

variety of species: over one million

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Phylum Bryozoa: Moss Animals
Taxonomic level: phylum Bryozoa; great of construction: organs obtained from three tissue layers; symmetry: bilateral; form of gut: complete; kind of human body cavity other than gut: coelom, typically reduced; segmentation: absent; circulatory system: absent; concerned system: single ganglion with nerves branching throughout zooid; excretion: no distinct structures.

various other features: early american invertebrates, with small individuals (zooids) feeding through lophophore, farming in sheets or erect colonies; a colonial nervous system allows coordination that zooids.

number of species: around 4,000

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Phylum Brachiopoda: Lingulas and Lampshells
Taxonomic level: phylum Brachiopoda; grade of construction: organs derived from three tissue layers; symmetry: bilateral; kind of gut: complete; type of human body cavity other than gut: coelom, in two sections; segmentation: absent; circulatory system: heart v blood vessels; worried system: rudimentary, but pets respond to light; excretion: no unique structures.

other features: solitary people with 2 valves, attached to bottom through pedicle, feed v ciliated lophophore.

variety of species: around 300

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Phylum Phoronida: Wormlike pets with a Lophophore
Taxonomic level: phylum Phoronida; great of construction: organs obtained from three tissue layers; symmetry: bilateral; type of gut: complete; kind of body cavity various other than gut: coelom in number of sections; segmentation: absent; circulatory system: blood vessels moving fluid with peristaltic action; worried system: rudimentary, but giant neurons prolong for the size of the pet to permit instant shortening; excretion: possible presence of offal of excretion.

other features: solitary individuals, wormlike, life in vertical tubes through lophophore protruding into water above.

number of species: around 10

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Phylum Echinodermata: animals with Fivefold Symmetry
Taxonomic level: phylum Echinodermata; class of construction: organs acquired from 3 tissue layers; symmetry: radial, sometimes combined with bilateral; form of gut: remote sac with very reduced anus, or finish with anus; type of human body cavity other than gut: coelom; segmentation: none; circulatory system: usually open to big coelomic cavity; concerned system: significant nerves expanding from nerve ring, no brain; excretion: diffusion.

other features: A spiny skin enclosed an inner skeleton that interlocking calcium carbonate plates; feeding and also locomotion on tube feet connected to water vascular system; includes starfish or sea stars, sea cucumbers, sea urchins.

number of species: around 6,000

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Phylum Chordata: The Sea Squirts
Taxonomic level: Subphylum Urochordata; great of construction: organs derived from three tissue layers; symmetry: bilateral; kind of gut: complete, v anus; type of human body cavity various other than gut: coelom; segmentation: none; circulatory system: heart with vessels; nervous system: brain with nerve cords; excretion: diffusion.

See more: What State Is Surrounded By The Most Water ? State Surrounded By The Most Water

other features: benthic sea squirts have a barrel-shaped body, through incoming and also outgoing siphons; tadpole larvae have attributes allying this graltoalsimce.org v vertebrates.