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23.5 Roundworms

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by

Katelynn Dorn

on 5 March 2015

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Transcript of 23.5 Roundworms

Roundworms Shed Their Stiff Outer Skeleton As They Grow
nematodes (Ecdysozoa)
cuticle- chitin
bilateral symmetry
23.5 Roundworms
Roundworm
Anatomy
cylindrical, blunt head & tapered tail
longitudinal muscle
pseudocoelom
digestive system- eat plant matter, algae, bacteria
Roundworm Reproduction
sexual
some eggs hatch w/in female reproductive tract
molting
Many Roundworms are Parasites
infect nearly every plant or animal
cause a lot of crop damage
3 major types affect humans
Hookworms
in digestive tract
feeds on blood
infections common in tropics and subtropics
Pinworms
found in gut
accidentally swallow eggs
Guinea Worms
found in guts and connective tissue
from drinking contaminated water
Full transcript