ZOOLOGY
Phylum Nematoda
Bill Palmer
Phylum Nematoda
Round Worms
12,000 Species
90,000 individuals a bad apple
Free Living and Parasitic
Free living usually smaller
Parasitic usually larger
One Class
Phylum Nematoda)
Numerous.
Wide variety of habitats.
Free-living and parasitic.
Phylum Nematoda
Have a cuticle covering
Can be in harsh environments
Many habitats- (beer vats, guts)
Simple Nervous system
No respiratory system
Unique execratory system
Make ammonia
Phylum Nematoda
Many ways to feed
Sexually different
Males are smaller
Hook tail on male
Female longer and fatter (for eggs)
Actually “mate”
Phylum Nematoda -Hookworm
Penetrate skin from soil
Get into blood vessels
Go to intestines
Hook onto intestine wall with sharp
“teeth”
Teeth puncture intestine and cause
bleeding
Eggs in waste, hatch in soil
Phylum Nematoda -Hookworm
Big problem in southern US where
larva survive winter and people go
barefooted.
Phylum Nematoda -Hookworm
Phylum Nematoda -Hookworm
Phylum Nematoda -Roundworm
Lives in humans
Lives in intestine
Absorbs food
Can be fatal
Phylum Nematoda -Roundworm
Phylum Nematoda -Roundworm
CAUTION..THE NEXT PICTURE IS
GROSS AND VERY GRAPHIC.
LOOK AWAY IF YOU DON’T WANT TO
BE GROSSED OUT.
Phylum Nematoda -Roundworm
Teenager given medicine to expel
worms
Phylum Nematoda -Roundworm
Phylum Nematoda -Pinworm
Phylum Nematoda-Trichina
Affects humans
From eating uncooked pork
Forms a cyst in muscle
Phylum Nematoda-Trichina
Phylum Nematoda-Trichina
Phylum Nematoda-Trichina
Phylum Nematoda
LESSONS LEARNED (I HOPE!)
KEEP CLEAN
WASH HANDS
COOK FOOD PROPERLY
Phylum Nematoda
1. Describe the life cycle of:
Pinworm
Trichina
Roundworm
Hookworm
2. Is ring worm a worm?
3.How is infection by Nematode
worms prevented?