Platyhelminthes - Minnesota State University Moorhead

Platyhelminthes - Minnesota State University Moorhead

Platyhelminthes The Flatworms Pechenik: 34,000 spp (Brusca & Brusca: 20,000 spp) Characteristics: Triploblastic Ectoderm, mesoderm, endoderm

Acoelomate Bilateral symmetry (w some cephalization)

Protonephridia = Organs for excretion/osmoregulation Flatness allows diffusion for gas exchange 80% are parasitic Simultaneous hermaphrodites (monoecious) Opisthaptor Ectoparasite One host

Monogenea Turbellaria Trematoda Acetabulum endoparasite Mollusc/vertebrate life cycle

Cestoda Free living Microtriches Scolex Proglottids

Cilia lost from ectoderm (parasitic lifestyle) Phylum Platyhelminthes Class Turbellaria Class Turbellaria

Class Turbellaria Class Turbellaria Class Turbellaria Class Turbellaria

Most are free living Marine & FW Sensory receptors Chemical (auricles) Tactile Light Dugesia sp.

Class Turbellaria Most are free living Marine & FW Sensory receptors

Chemical Tactile Light Cephalized Crawl on substrate

using cilia Dugesia sp. Class Turbellaria Incomplete digestive tract Pharynx Class Monogenea

haptor opisthaptor Class Monogenea Ectoparasites of fish skin and gills Only 1 host

Monogenea Reproduction: Eggs oncomiracidium larva attach to fish Larva similar to cestode oncosphere Adults resemble digene trematoda (convergent evolution life cycles very different)

Recently Viewed Presentations

  • 1. dia - u-szeged.hu

    1. dia - u-szeged.hu

    Koponya - Cranium Az arckoponya csontjai Humánbiológia gyakorlat 4.2. Az arckoponya csontjai 1. Rostacsont - Os ethmoidale A két szemüreg közét elfoglaló, egészben kocka alakú, papírvékony csontlemezekből álló, légtartalmú üregekkel rendelkező csont függőleges lemeze - lamina perpendicularis (a csontos orrsövény...
  • Experimental Studies of High-speed Liquid Films on Downward ...

    Experimental Studies of High-speed Liquid Films on Downward ...

    Times New Roman Wingdings Arial 굴림 Arial Black Symbol Tahoma Wingdings 2 Wingdings 3 Webdings 바탕 films Microsoft Excel Chart Canvas 7 Drawing Adobe Photoshop Image Microsoft Equation 3.0 MathType 4.0 Equation An Overview of the Fluid Dynamics Aspects of...
  • WATERCOLOUR TECHNIQUES FLAT WASH  Begin by wetting the

    WATERCOLOUR TECHNIQUES FLAT WASH Begin by wetting the

    alcohol. When you add alcohol to wet watercolour paint, the alcohol repels the paint. A Q-tip or other pointed object can help you control the amount of alcohol you want to add to your page (ex.
  • Practical Robust Localization over Large-Scale Wireless ...

    Practical Robust Localization over Large-Scale Wireless ...

    Results: Static localization Result: Excellent accuracy over the entire building Results: Static localization II Experiment: Use only N scans/cell for training Result: Gaussian needs a lot less training data This is in addition to gains from topology model Problem: Untrained...
  • Development Administration: C.A.G.- Focus on comparative and ...

    Development Administration: C.A.G.- Focus on comparative and ...

    Entrance Examinations c. Field Training (Internships) d. Critique: caste status of bureaucrat, aloof, exclusive and inflexible Prussian Law: Cameralism is an economic theory in which public revenue is sole measure of national prosperity India- Northcote-Trevelyn Report of 1854-BB (Before Britain)...
  • Family Life - Sociology

    Family Life - Sociology

    Family Structures 1st Generation 2nd Generation Nuclear Family Parent 1 Parent 2 Child(ren) 2 Generations 1st Generation 2nd Generation Vertically Extended Family Grandparents Parents Child(ren) 3 Generations 3rd Generation Horizontally Extended Family Parents Child(ren) Brothers (Uncles) Sisters (Aunts) 2 Generations...
  • Topographic Maps *these notes go on pages 19

    Topographic Maps *these notes go on pages 19

    Topo Map Profile: cross sectional view along a line drawn through a topo map. HOW: make a line through your map & label (X-Y, X-X', etc.) use edge of paper and make "ticks" every time a contour line intersects. record...
  • End of the Great War and the Treaty

    End of the Great War and the Treaty

    End of the Great War and the Treaty of Versailles * * American Intervention, 1917-1918 May 1915: Lusitania (128 US citizens) February 1917: Germany declared unconditional submarine warfare Zimmermann Telegram Sent and deciphered in Jan. 1917 Brits gave it to...