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STRUCTURE AND FUNCTION IN PROTISTS
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Amoeba proteus: formation of pseudopods
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Cilia: hair-like structures which aid movement and help to produce water currents which bring food to the organism
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Cilia aid in movement
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Stentor uses cilia around the oral groove to pull food into
the food vacuole
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The oral groove of the Paramecium
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Phagocytosis in the Amoeba
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Probing for food
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Euglena is especially interesting since it is green and photosynthetic and has
flagella
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The contractile vacuole is a structure which helps the organism remove excess water from its body
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Some have a proboscis, like an elephants trunk, which helps in
capturing prey .
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Some protists have shells; this one is extending pseudopods from
its shell (test)
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Vorticella has a stalk which can contract to move it rapidly away from a disturbance.
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Bursaria are easy to identify because of their
unusual shape
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Didinium has a horse-shoe shaped nucleus; also note the cilia and
other organelles.
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Reproduction
Some protists form colonies like these algae
Single celled or multi-celled? The volvox is a colonial organism. Here we see daughter cells before they burst out of the mother to become independent colonies of their own.
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diatoms
Trypanasoma: note the blood cells
Spirogyra
The Hay Infusion
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