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NEMATHELMINTHES • I CHARACTERISTICS • 1. Bilateral symmetry • 2. Triploblastic • 3. No segmentation • 4. Complete digestive tract • 5. Pseudocoel present • 6. Many parasitic forms present NEMATHELMINTHES contd. • 7. Moves in S motion • 8. Tube within a tube body plan • 9. “Nematodes” are threadlike • 10. Dieocious • II EXAMPLES • 1. HOOKWORMS • 2. TRICHINA WORMS • 3. PIN WORMS NEMATHELMINTHES contd. • • • • • 4. 5. 6. III 1. tube • 2. Filaria Worm (elephantiasis) Eye Worm Guinea Worm ASCARIS Good example of tube within a body plan. Pseudocoelomate NEMATHELMINTHES contd. • • • • • 3. Psarasite of man & pigs IV SYSTEMS (p. 175) 1. Digestive 2. Excretory 3. Reproductive
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