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basic Facts provided for every phylum handily grpiersonforcongress.com organisms" taxonomy, structure, and also function, in a concise style for lull 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 human body cavity other than gut: none; segmentation: none; circulatory system: none; worried system: none; excretion: diffusion from cell surface.

various other features: autonomous single cells, reproducing by fission.

variety of species: end 30,000

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Phylum Porifera: Sponges, most basic of Animals
Taxonomic level: phylum Porifera; great of construction: cellular, with no unique tissues or organs; symmetry: variable; kind of gut: none; kind of human body cavity other than gut: none; segmentation: none; circulatory system: none; worried system: none; excretion: diffusion from cell surface.

other features: flagellated cells referred to as choanocytes drive water with pores and also cavities.

number of species: 5,000

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

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

number of species: 9,000

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

other features: planarization free-living worms, frequently with tubular pharynx to conference food; also, numerous parasitic species; representatives encompass the typical freshwater planaria and also the tapeworms.

variety of species: 12,000

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Phylum Nemertea: Ribbon Worms
Taxonomic level: phylum Nemertea; grade of construction: organs derived from 3 tissue layers; symmetry: bilateral; kind of gut: complete, through anus; type of human body cavity various other than gut: rhynchocoel bordering proboscis; segmentation: absent; circulatory system: present; worried system: little bundles of nerves (ganglia), two nerve cords; excretion: excretory guts in countless species.

other features: elongate free-living worms, with finish gut; carnivorous, making use of barbed proboscis to kill prey.

variety of species: greater than 800

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Phylum Nematoda: The Roundworms
Taxonomic level: phylum Nematoda; great of construction: organs derived from three tissue layers; symmetry: bilateral; form of gut: complete; kind of human body cavity other than gut: pseudocoel; segmentation: absent; circulatory system: present; concerned system: tiny bundles that nerves (ganglia), 2 nerve cords; excretion: special excretory cells.

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

number of species: 12,000

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Phylum Annelida: Segmented Worms
Taxonomic level: phylum Annelida; grade of construction: organs obtained from three tissue layers; symmetry: bilateral; form of gut: finish with anus; form of body cavity other than gut: coelom; segmentation: present; circulatory system: close up door system; concerned system: brain, v nerve cords and bundles (ganglia); excretion: excretory guts in most segments.

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

number of species: 12,000

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Phylum Sipuncula: Peanut Worms
Taxonomic level: phylum Sipuncula; class of construction: organs derived from three tissue layers; symmetry: bilateral; type of gut: finish with anus; type of body cavity other than gut: coelom; segmentation: absent; circulatory system: huge coelomic cavity bathes many tissues; concerned system: mind with single ventral nerve cord, with branches; excretion: paired organs.

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

variety of species: about 300

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Phylum Ponogonophora: Gutless Wonders
Taxonomic level: phylum (might properly belong within the Annelida) Pogonophora; grade of construction: organs acquired from three tissue layers; symmetry: bilateral; form of gut: none; kind of human body cavity various other than gut: coelom in numerous sections; segmentation: existing in one region; circulatory system: dorsal and also ventral blood vessels, with part of the dorsal ship muscularized into a heart; nervous system: brain with rudimentary nerve cords; excretion: paired organs.

various other features: solitary worm-shaped people with no gut; depend upon symbiotic bacteria for nutrition.

number of species; around 100

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Phylum Mollusca: Shelled Invertebrates (Mostly)
Taxonomic level: phylum Mollusca; class of construction: organs derived from 3 tissue layers; symmetry: bilateral; form of gut: complete, through anus; form of body cavity other than gut: coelom; segmentation: absent; circulatory system: usually open to large coelomic cavity; worried system: brain, with nerve cords and also bundles (ganglia), brain very well arisen in squids and also relatives; excretion: excretory organs.

various other features: typically externally shelled, mantle secretes shell; respires with ctenidium; contains clams, snails, squids, octopus.

variety of species: an ext than 100,000

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Phylum Arthropoda: Jointed Appendages
Taxonomic level: phylum Arthropoda; grade of construction: organs obtained from three tissue layers; symmetry: bilateral; type of gut: finish with anus; kind of human body cavity other than gut: coelom; segmentation: present; circulatory system: usually open to big coelomic cavity; concerned system: brain, v nerve cords and also bundles (ganglia), link eyes; excretion: excretory organs.

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

number of species: end one million

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Phylum Bryozoa: Moss Animals
Taxonomic level: phylum Bryozoa; great of construction: organs acquired from 3 tissue layers; symmetry: bilateral; type of gut: complete; kind of human body cavity other than gut: coelom, generally reduced; segmentation: absent; circulatory system: absent; concerned system: solitary ganglion with nerves branching transparent zooid; excretion: no special structures.

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

number of species: about 4,000

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Phylum Brachiopoda: Lingulas and also Lampshells
Taxonomic level: phylum Brachiopoda; class of construction: organs obtained from 3 tissue layers; symmetry: bilateral; form of gut: complete; type of body cavity various other than gut: coelom, in two sections; segmentation: absent; circulatory system: heart v blood vessels; nervous system: rudimentary, but animals respond to light; excretion: no one-of-a-kind structures.

various other features: solitary individuals with 2 valves, attached come bottom through pedicle, feed v ciliated lophophore.

variety of species: around 300

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Phylum Phoronida: Wormlike animals with a Lophophore
Taxonomic level: phylum Phoronida; great of construction: organs acquired from 3 tissue layers; symmetry: bilateral; kind of gut: complete; form of human body cavity other than gut: coelom in number of sections; segmentation: absent; circulatory system: blood ship moving fluid with peristaltic action; concerned system: rudimentary, but giant neurons prolong for the size of the pet to permit instant shortening; excretion: possible presence of guts of excretion.

various other features: solitary individuals, wormlike, living in upright tubes through lophophore protruding right into water above.

number of species: around 10

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Phylum Echinodermata: animals with Fivefold Symmetry
Taxonomic level: phylum Echinodermata; great of construction: organs obtained from three tissue layers; symmetry: radial, sometimes merged with bilateral; type of gut: blind sac with very reduced anus, or complete with anus; type of body cavity various other than gut: coelom; segmentation: none; circulatory system: usually open to big coelomic cavity; nervous system: major nerves extending from nerve ring, no brain; excretion: diffusion.

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

variety of species: around 6,000

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Phylum Chordata: The Sea Squirts
Taxonomic level: Subphylum Urochordata; class of construction: organs derived from 3 tissue layers; symmetry: bilateral; type of gut: complete, through anus; form of human body cavity other than gut: coelom; segmentation: none; circulatory system: heart through vessels; concerned system: brain with nerve cords; excretion: diffusion.

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various other features: benthic sea squirts have a barrel-shaped body, v incoming and also outgoing siphons; tadpole larvae have functions allying this grpiersonforcongress.com with vertebrates.