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1. parthenogenesis 2. cuticle Hookworm * 4. trichinosis Pinworm* 6. filarial worm*

NEMATODA Vocabulary Preview Cards first card should have title and page # .. make the card for each word first…THEN go back and define the term.. USE 4 DIFFERENT COLORS FOR THE CARDS info found on pages 180-185. 1. parthenogenesis 2. cuticle Hookworm * 4. trichinosis

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1. parthenogenesis 2. cuticle Hookworm * 4. trichinosis Pinworm* 6. filarial worm*

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  1. NEMATODA Vocabulary Preview Cards first card should have title and page # ..make the card for each word first…THEN go back and define the term..USE 4 DIFFERENT COLORS FOR THE CARDSinfo found on pages 180-185 1. parthenogenesis 2. cuticle • Hookworm * 4. trichinosis • Pinworm* 6. filarial worm* 7. Elephantiasis 8. vermiform 9. cloaca 10. Microfilaria *Read in the text & summarize the information for the card..  MAKE SURE U # EACH CARD.

  2. PREVIEW CARDS ..info starts pg. 180 **Add these cards to the end of vocab words.. Fill in the cards using the info from the text..this may be done with bullets ***The info will be on test*** 11. Characteristics of Nematodes 12. Class Secernentea 13. Class Adenophorea 14. External body description 15. 3 primary layers of the cuticle & function 16. Internal body description 17. Feeding and Digestive System

  3. 1. PARTHENOGENESIS- modified form of sex. Reproduction by the development of a gamete without fertilization • 2. CUTLICLE- noncellular, protective organic layer secreted by the external epithelium (hypodermis) of many invertebrates • 3. HOOKWORM- (New World or American Hookworm) Necatoramericanus; found in southern US; adults live in small intestine

  4. 4. TRICHINOSIS- caused by (the porkworm) Trichinellaspiralislarvae; get from eating undercooked meat; characterized by muscular pain, fever, edema (swelling), & other symptoms • 5. PINWORM- Enterobiusvermicularis; most common roundworm parasites in the US • 6. FILARIAL WORM- Wuchereria spp.; elongate, threadlike nematodes that live in the lymphatic system, where they block the vessels

  5. 7. ELEPHANTIASIS- a chronic filarial disease most commonly occurring in the tropics due to the infection of lymphatic vessels with the nematode Wuchereria spp. • 8. VERMIFORM- resembling a worm in shape; long and slender • 9 . CLOACA- a common opening for excretory, digestive, & reproductive systems • 10. MICROFILARIA- the prelarval stage of filarial worms; found in the blood of humans and the tissues of the vector (carrier)

  6. 11. Characteristics • triploblastic, vermiform, unsegmented, pseudocoelmate • Body round in cross section and covered by a layered elastic cuticle; molting usually accompanies growth in juveniles • Complete digestive tract; mouth usually surrounded by lips bearing sense organs • Most with unique excretory system • Body was has only longitudinal muscles

  7. 12. Class Secernentea • About 5, 000 described species • Ascaris, Enterobius, Necator, Wuchereria important genera to the species • Both free-living and parasitic species

  8. 13. Class Adenophorea • Most free-living, but some parasitic species occur • Trichinellagenus is present in this class • About 3,000 species

  9. 14. External body description • Slender, elongate, cylindrical, & tapered at both ends

  10. 15. 3 primary layers of cuticle & fx • Most of success of phylum is due to the outer cuticle that is continuous with the foregut, hindgut, sense organs, and parts of the female reproductive system • Cuticle may be smooth or may contain spines, etc. • 3 primary layers make up the cuticle • The cuticle is usually molted 4x during maturation (grown from juvenile to adult) • Longitudinal muscles are the principal means of locomotion in nematodes they lack circular muscles so they cannot crawl like other worms

  11. 16. Internal body description • Has a pseudocoelom – spacious, fluid-filled cavity that contains visceral organs and forms a hydrostatic skeleton • They are round because the body muscles contracting against the pseudocoelomic fluid generate an equal outward force in all directions

  12. 17. Feeding and digestion • Depends on environment • Can feed on a wide variety of foods • May be carnivores, herbivores, omnivores, or saprobes that consume decomposing organisms • MAY ALSO BE PARASITIC & feed on blood and tissue of their hosts • Have a complete digestive system

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