Nematoda (Roundworm) By: Keenan Faix and Timmy Lee (fake)
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Transcript of Nematoda (Roundworm) By: Keenan Faix and Timmy Lee (fake)
![Page 1: Nematoda (Roundworm) By: Keenan Faix and Timmy Lee (fake)](https://reader035.fdocuments.us/reader035/viewer/2022062312/55157adb550346486b8b522e/html5/thumbnails/1.jpg)
Nematoda (Roundworm)
By: Keenan Faix and Timmy Leehttp://www.ento.csiro.au/science/nematodes/nem_monster.gif
(fake)
![Page 2: Nematoda (Roundworm) By: Keenan Faix and Timmy Lee (fake)](https://reader035.fdocuments.us/reader035/viewer/2022062312/55157adb550346486b8b522e/html5/thumbnails/2.jpg)
Sample Animals
• Soybean Cyst Nematode• http://en.wikipedia.org/wiki/
File:Soybean_cyst_nematode_and_egg_SEM.jpg
http://images.google.com/imgres?imgurl=http://protist.i.hosei.ac.jp/pdb/Images/Multicell/Nematoda/sp_2.jpg&imgrefurl=http://protist.i.hosei.ac.jp/pdb/Images/Multicell/Nematoda/index.html&usg=__h_xLCz2q_2IJmbqA9ayKv6gl4nc=&h=484&w=606&sz=73&hl=en&start=52&um=1&itbs=1&tbnid=rO1sJUizZXHsCM:&tbnh=109&tbnw=136&prev=/images%3Fq%3Dnematoda%26start%3D36%26um%3D1%26hl%3Den%26safe%3Doff%26client%3Dsafari%26sa%3DN%26rls%3Den%26ndsp%3D18%26tbs%3Disch:1
Unidentified Species of a Nemotoda (class Adenophorea)
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Body Cavity (Coelom)
• Present• Pseudocoelomate –Body cavity is only
partially lined by tissue derived from mesoderm
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Body Symmetry
• Bilateral Symmetry
http://bioweb.uwlax.edu/bio203/s2009/maiers_andr/nematode%205.bmp
![Page 5: Nematoda (Roundworm) By: Keenan Faix and Timmy Lee (fake)](https://reader035.fdocuments.us/reader035/viewer/2022062312/55157adb550346486b8b522e/html5/thumbnails/5.jpg)
Nervous System
• Has a Pharyngeal Nerve Ring–Essentially a ring of nerves starting near the mouth and extending back into the body
![Page 6: Nematoda (Roundworm) By: Keenan Faix and Timmy Lee (fake)](https://reader035.fdocuments.us/reader035/viewer/2022062312/55157adb550346486b8b522e/html5/thumbnails/6.jpg)
Circulatory System
• None - No blood system
http://www.bu.edu/gk12/eric/nematode.jpg
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Digestive System
• There is a digestive system with a through gut• Oral cavity opens with a muscular pharynx• Digestive glands found in gut
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Excretory System
• Anus• Removes nitrogenous (ammonia) wastes
through the body wall
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Locomotion
• Longitudinal Muscles that produce thrashing movement
• Muscular layer surrounds body cavity• Filled with blood-lacking fluids
![Page 10: Nematoda (Roundworm) By: Keenan Faix and Timmy Lee (fake)](https://reader035.fdocuments.us/reader035/viewer/2022062312/55157adb550346486b8b522e/html5/thumbnails/10.jpg)
Skeletal Type
• None
http://www.inra.fr/hyppz/DESSINS/8032041.gif
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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
![Page 12: Nematoda (Roundworm) By: Keenan Faix and Timmy Lee (fake)](https://reader035.fdocuments.us/reader035/viewer/2022062312/55157adb550346486b8b522e/html5/thumbnails/12.jpg)
Reproduction
• Sexual• Internal fertilization• Zygotes of most species are resistant to
harmful conditions • Females may deposit over 100,000 eggs in a
day
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Gas Exchange
• Diffusion of gasses across the body wall, or cuticle
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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
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What type of body cavity do nematodes possess?
A) NoneB) CoelomateC) PseudocoelomateD) Acoelomate
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Which is not a function of the Cuticle?
A) Diffusion of gasesB) Removal nitrogenous wastesC) MovementD) For Molting
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Which one of these is not a Nematode Organ System?
A) DigestiveB) NervousC) CirculatoryD) Excretory
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What areas do most Nematodes resided in?
A) SoilB) Aquatic habitatsC) Bodily Fluids and TissuesD) Moist Tissues of PlantsE) All of the aboveF) Volcanoes