ZOOLOGY Phylum Nematoda Bill Palmer Phylum Nematoda Round

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?