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madeline freeman Q4

mmf Q4 animals worms- semented worms

QuestionAnswer
what phylum are segmented worms in? phylum annelids
what is the most common, developed, and helpful annelid? the earthworm
are they the most r least complex? most complex
where are they found? fresh water, salt water, and soil; moist places
what kind of worm are they? decomposers, for soil
how do they move? by setae
musclar/skeletal system? no skeleton, 2 sets of muscles, one goes around worm and the other goes along the body.
digestion system? definite system, eats dirt, the plant and animal matter in it. food goes through esophagus, crop stores food, gizzard grinds it up, waste goes through intestines and out the anus. waste fertilizes soil
nervous system? simple brain, nerve chord.
circulatory system? many hearts, 5-10, blood, blood vessels
respitory system? no formal system, takes oxygen through skin, must always be moist
how does it reproduce? sexually, male and female. they are hermaphrodites
what is its appearance? dorsal, top side, is dark and the ventral, bottom, is light or camo. has segmented body.
what kind of symmetry does it have? bilateral
Created by: madelinefreeman
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