Difference between revisions of "Protozoa Structure and Function"
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| − | [[Image:Flagella.jpg|thumb|right|150px|Flagella of ''E.coli'' | + | [[Image:Flagella.jpg|thumb|right|150px|Flagella of ''E.coli'' - Nicolle Rager Fuller, National Science Foundation]] |
*Motile | *Motile | ||
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*Gliding | *Gliding | ||
**No obvious means of locomotion | **No obvious means of locomotion | ||
| − | **E.g. ''[[Eimeria spp.|Eimeria]]'' | + | **E.g. ''[[Eimeria spp.|Eimeria]]''[[Category:Protozoa]] |
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| − | [[Category:Protozoa]] | ||
[[Category:To_Do_-_Parasites]] | [[Category:To_Do_-_Parasites]] | ||
Revision as of 22:24, 26 June 2010
- Motile
- Protozoa possess all the 'usual' organelles which are found in most animal cells
- Nucleus, endoplasmic reticulum, mitochondria, Golgi bodies and lysosomes
- Protozoa also possess other cellular structures, organelles and sub-cellular structures which enable an independent existence to be led
- Cilia
- Fine, short hairs covering the protozoal surface each arising from a basal body
- Hairs beat in unison to enable the protozoa to move
- Wafts food towards the cytostome (mouth opening)
- E.g. Balantidium
- Flagellum
- Contractile fibre arising from a basal body
- Contracts in a whip like motion to propel protozoa
- Attached to body of some protozoa by an undulating membrane
- During movement, the organism's shape is maintained by microtubules in the pellicle
- E.g. Trypanosoma
- Pseudopodia
- Extensions of the cellular cytoplasm
- Cytoplasm flows into the pseudopodia allowing movement of the protozoa
- Also acts in a phagocytic manner surrounding food particles and enclosing it in a vacuole
- E.g. Entamoeba
- Gliding
- No obvious means of locomotion
- E.g. Eimeria