Nematode(线虫)
Nematode(线虫) 3
Round worms 线虫 Nematode 似蚓蛔线虫(蛔虫) 毛首鞭形线虫〔鞭虫)蠕形住肠线虫(蛲虫) Ascaris lumbricoides Trichuris trichiura Enterobius vermicularis 钩虫 旋毛形线虫(旋毛虫) 丝虫 Hookworm Trichinella spiralis Fil laria e
Round Worms 4
Introduction .o Among the commonest of all parasites and responsible for diseases of major importance in humans os Non-segmented roundworms belonging to the phylum Nemathelminthes, class nematoda s The sexes are usually separate(Dioecious) the male which is smaller than the female commonly has a curved posterior end
Introduction ❖ Among the commonest of all parasites and responsible for diseases of major importance in humans ❖ Non-segmented roundworms belonging to the phylum Nemathelminthes, class nematoda ❖ The sexes are usually separate (Dioecious), the male which is smaller than the female commonly has a curved posterior end 5
Morphology 冷 Cylindrical and slender &s Bilaterally symmetrical ☆Sex- diferentiated . o Coelomic cavity: protocole os The supporting body wall consists of cuticle layer, syncytial layer(subcutical layer) and longitudinal muscular layer %s The alimentary tract is a simple tube extending from the mouth to the anus
Morphology ❖ Cylindrical and slender ❖ Bilaterally symmetrical ❖ Sex-differentiated ❖ Coelomic cavity: protocoele ❖ The supporting body wall consists of cuticle layer, syncytial layer (subcutical layer) and longitudinal muscular layer ❖ The alimentary tract is a simple tube extending from the mouth to the anus 6
dorsal nerve cuticle一 ovary intestine hypodermIs lateral nerve contractIle longI tudI nal muscle @ pseudocoelom uterus subventral nerve noncontractIle ventral nerve longI tudInal muscle