|Picture 2.5b The cilia on this protozoan enable it to move.|| |
| ||How do they move?|
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Most protozoa are motile. They use different means, such as:
- pseudopodia, where the protoplasm streams forward, changing the shape of the organism as it moves e.g. Amoeba
- flagella long, whip-like appendages
- cilia short appendages which are distributed all over the surface of the organism, which beat together.
The way by which protozoa move is so characteristic that it is used to classify them into groups.
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| ||Dormant stages|
| || ||Protozoa can form a cyst, which is a dormant stage. This occurs in response to adverse conditions such as a lack of food. The cyst is a protective stage and it also allows parasitic species to survive outside the host until it can infect another one.|
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