1.

what are cilia and flagella according to class 8

Answer»

Cilia (L., cili, eye lash) and flagella (L., little whip) are situated external to cytoplasm but have their origin from cytoplasm.

Many protozoans, flatworms and plant cells bear these structures. In protozoans, cilia and flagella are the main organelles of locomotion.Flagella are nearly always associated with locomotion, but cilia, which are of much wider occurrence, perform other functions as well. For example, they are found lining ducts and tubules and other specialized surfaces along which materials are wafted by means of their rapid and rhythmical beatings. Cilia and flagella also create food currents and act as sensory organs.

Cilia and flagella are fundamentally similar but cilia are generally greater in number than the flagella. In Paramecium, a single cell possesses about 17,000 cilia; each one is about 10 µ long. These cilia may be 5 to 10µ in length.



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