Phylum

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what are they?

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Arthropoda: Insects, crustaceans, spiders scorpions and centipedes. More species of arthropods than all the other phyla combined. Bilateral symmetry Segmented bodies

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Exoskeleton Jointed appendages Grow by molting Open body cavity, open circulatory system.

Porifera: : 

Porifera: Sponges 5000 Species, mostly marine (salt water) Have a system of pores for water to pass through Pores have flagella, that beat back and forth to move water.

Chordata: : 

Chordata: All have a notochord (spinal chord) with enlarged end (brain) Complete digestive system, closed blood system. Bony or cartilaginous endoskeleton. Bilateral symmetry

Ctenophora: : 

Ctenophora: Have small transparent bodies. Have rows of little combs. Differ from regular jelly fish because they have no stinger.

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Echinodermata: Starfish, sand dollars, brittle stars sea cucumbers and sea urchins Spiny skin Radial symmetry (Look at board) Sucker feet to grip and move,

Annelida: : 

Annelida: All members have segmented bodies. Each segment contains part of the nervous system, respiratory system and digestive system. Have a true body cavity and organs.

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Platyhelminthes: Worms that are flat and ribbon thin. Animals have definite organs and many are parasitic.

Mollusca: : 

Mollusca: soft bodied animals. Well developed head Large muscular foot for movement. Most have a radula, which is a structure used for feeding.

Coelenterates: : 

Coelenterates: Marine animals with stinging tentacles. Basic form is a sac like body containing a digestive cavity.

Nematoda : 

Nematoda Roundworms One rotting apple can contain 90,000 individual worms. Can be helpful and parasitic Human parasites include hook worms, trichina and pinworms. Pinworms are common infection in young children in US!