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Nematoda (Roundworm) By: Keenan Faix and Timmy Lee (fake)

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Presentation on theme: "Nematoda (Roundworm) By: Keenan Faix and Timmy Lee (fake)"— Presentation transcript:

1 Nematoda (Roundworm) By: Keenan Faix and Timmy Lee http://www.ento.csiro.au/science/nematodes/nem_monster.gif (fake)

2 Sample Animals Soybean Cyst Nematode http://en.wikipedia.org/wiki/File:Soybean_cyst_nemato de_and_egg_SEM.jpg http://images.google.com/imgres?imgurl=http://protist.i.hosei.ac.jp/p db/Images/Multicell/Nematoda/sp_2.jpg&imgrefurl=http://protist.i.ho sei.ac.jp/pdb/Images/Multicell/Nematoda/index.html&usg=__h_xLCz2 q_2IJmbqA9ayKv6gl4nc=&h=484&w=606&sz=73&hl=en&start=52&um =1&itbs=1&tbnid=rO1sJUizZXHsCM:&tbnh=109&tbnw=136&prev=/im ages%3Fq%3Dnematoda%26start%3D36%26um%3D1%26hl%3Den%2 6safe%3Doff%26client%3Dsafari%26sa%3DN%26rls%3Den%26ndsp%3 D18%26tbs%3Disch:1 Unidentified Species of a Nemotoda (class Adenophorea)

3 Body Cavity (Coelom) Present Pseudocoelomate –Body cavity is only partially lined by tissue derived from mesoderm

4 Body Symmetry Bilateral Symmetry http://bioweb.uwlax.edu/bio203/s2009/maiers_andr/nematode%205.bmp

5 Nervous System Has a Pharyngeal Nerve Ring – Essentially a ring of nerves starting near the mouth and extending back into the body

6 Circulatory System None - No blood system http://www.bu.edu/gk12/eric/nematode.jpg

7 Digestive System There is a digestive system with a through gut Oral cavity opens with a muscular pharynx Digestive glands found in gut

8 Excretory System Anus Removes nitrogenous (ammonia) wastes through the body wall

9 Locomotion Longitudinal Muscles that produce thrashing movement Muscular layer surrounds body cavity Filled with blood-lacking fluids

10 Skeletal Type None http://www.inra.fr/hyppz/DESSINS/8032041.gif

11 Sensory Structures Lateral Nerves are sensory Ventral Nerves combine both Lateral and Dorsal Nerve functions Contain sensory bristles and papillae to give a sense of touch Chemoreception organs near the head

12 Reproduction Sexual Internal fertilization Zygotes of most species are resistant to harmful conditions Females may deposit over 100,000 eggs in a day

13 Gas Exchange Diffusion of gasses across the body wall, or cuticle

14 Other Unique Features Found in most aquatic habitat, soil, moist tissue of plants, and in body fluids and tissues Body is covered by tough coat called the Cuticle which molts (sheds) after aging Many are parasitic

15 What type of body cavity do nematodes possess? A)None B)Coelomate C)Pseudocoelomate D)Acoelomate

16 Which is not a function of the Cuticle? A)Diffusion of gases B)Removal nitrogenous wastes C)Movement D)For Molting

17 Which one of these is not a Nematode Organ System? A)Digestive B)Nervous C)Circulatory D)Excretory

18 What areas do most Nematodes resided in? A)Soil B)Aquatic habitats C)Bodily Fluids and Tissues D)Moist Tissues of Plants E)All of the above F)Volcanoes


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