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PROTOZOA

PROTOZOA. Výukový materiál OR 03 - 66 Tvůrce: Mgr. Alena Výborná Tvůrce anglické verze: Mgr. Miloslava Dorážková Projekt: S anglickým jazykem do dalších předmětů Registrační číslo: CZ.1.07/1.1.36/03.0005 Tento projekt je spolufinancován ESF a SR ČR. PROTOZOA.

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PROTOZOA

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  1. PROTOZOA Výukový materiál OR 03 - 66 Tvůrce: Mgr. Alena Výborná Tvůrce anglické verze: Mgr. Miloslava Dorážková Projekt: S anglickým jazykem do dalších předmětů Registrační číslo: CZ.1.07/1.1.36/03.0005 Tento projekt je spolufinancován ESF a SR ČR

  2. PROTOZOA • The simplest animals (eukaryotic) • The body is made up by one cell • One cell: • Accepts • Processes • Excludes • Breathes • Moves • Reacts to the stimulus • Reproduces

  3. PROTOZOA • Microscopic • Heterotrophic • A cell includes: • Food vacuoles • Contractile (pulsating) vacuoles • The movement is made by: • Amoeba (pseudopods) • Flagella • Cilium • Undulating membrane

  4. PROTOZOA • They accept stimulus from their surroundings: • By whole surface of the body • By sense organs: • Cilium (touch) • Pigment spots (accept light) • Reproduction: • Asexual (division, budding) • Sexual (joining different nucleus)

  5. PROTOZOA • Some of them create shells of silicon dioxide • Some of them cover their bodies by shells made of small sand grains • CYST • A rest, immobile, resistant stadium • Its function is to survive in unfavourable conditions

  6. PROTOZOA • The importance of protozoa: • Autotrophic protozoa belong to the basic parts of a food chain • Soil protozoa are important for soil fertility • A bio-indicator of the environment • They cause serious diseases

  7. PROTOZOA • GROUPS: • FLAGELLATE • RHIZOPODA • INFUSORIA

  8. PROTOZOA – FLAGELLATA • One or more flagella • The most original • Coreopsis: • Mixotrophic (autotrophic and heterotrophic) • A spot reacting to light • One or two flagella • Pools, puddles, polluted water

  9. Euglena • A stigma • Chloroplasts • A nucleus • A flagellum

  10. PROTOZOA – FLAGELLATA • Trypanosoma gambiense: • It lives in blood of a man and some mammals • It causes a sleeping sickness • A death disease, spread in tropic Africa • It is transmitted by a tsetse fly

  11. Trypanosoma gambiense

  12. Trypanosoma gambiense

  13. PROTOZOA - RHIZOPODA • A changeable body shape • They accept food thanks to pseudopods • Amoeba proteus • poodles, bottoms of pools • Entamoeba histolytica • a parasitical, gastric disease

  14. Amoeba proteus – a cell structure • A food vacuole • A contractile vacuole • A nucleus • Cytoplasm • A pseudopod

  15. PROTOZOA - INFUSORIA • The most perfect protozoa • The most complicated structure • They move thanks to flagella • The accept food by a cell mouth • They eat bacteria, algae… • The are food for many animals

  16. PROTOZOA - INFUSORIA • Paramecium caudatum • Polluted waters • An indicator of pollution • Vorticella • They appear in dense cover of water plants • Stylonychia mytilus • In water plants

  17. PROTOZOA – INFUSORIA, COREOPSIS • A stigma • Chloroplasts • A nucleus • A flagellum • Paramecium caudatum • Coreopsis • Stylonychia mytilus

  18. Revision: • 1) Name at least three organelles of movement: • 2) Which infusorian lives in polluted waters? • 3) A rest, immobile, resistant stadium is called: • 4) What causes a sleeping sickness ? • 5) What vacuoles does a cell of infusoriainclude?

  19. Source: • DOBRORUKA, Luděk J. Přírodopis pro 7. ročník základní školy. 1. vyd. Praha: Scientia, 1998, 152 s. ISBN 80-718-3134-4

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