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| | [[Image:Flagella.jpg|thumb|right|150px|Flagella of ''E.coli'' - Nicolle Rager Fuller, National Science Foundation]] | | [[Image:Flagella.jpg|thumb|right|150px|Flagella of ''E.coli'' - Nicolle Rager Fuller, National Science Foundation]] |
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| − | ==Structure and function== | + | ==[[Protozoa Structure and Function]]== |
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| − | *Motile
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| − | *Protozoa possess all the 'usual' organelles which are found in most animal cells
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| − | **Nucleus, endoplasmic reticulum, mitochondria, Golgi bodies and lysosomes
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| − |
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| − | *Protozoa also possess other cellular structures, organelles and sub-cellular structures which enable an '''independent existence''' to be led
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| − | *Cilia
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| − | **Fine, short hairs covering the protozoal surface each arising from a basal body
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| − | **Hairs beat in unison to enable the protozoa to move
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| − | **Wafts food towards the '''cytostome''' (mouth opening)
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| − | **E.g. ''Balantidium''
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| − |
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| − | *Flagellum
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| − | **Contractile fibre arising from a basal body
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| − | **Contracts in a whip like motion to propel protozoa
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| − | **Attached to body of some protozoa by an '''undulating membrane'''
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| − | **During movement, the organism's shape is maintained by microtubules in the pellicle
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| − | **E.g. ''Trypanosoma''
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| − |
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| − | *Pseudopodia
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| − | **Extensions of the cellular cytoplasm
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| − | **Cytoplasm flows into the pseudopodia allowing movement of the protozoa
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| − | **Also acts in a phagocytic manner surrounding food particles and enclosing it in a vacuole
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| − | **E.g. ''Entamoeba''
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| − |
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| − | *Gliding
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| − | **No obvious means of locomotion
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| − | **E.g. ''[[Eimeria spp.|Eimeria]]''
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| | ==Nutrition and digestion== | | ==Nutrition and digestion== |