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Phylum Protozoa - Methods of locomotion - Part-4 - Metabolic and gliding movement
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AAKRITI
Graduate in Biology Completed M.Sc. in Zoology Power is gained by sharing knowledge not hoarding it.

U
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  1. PHYLUM: PROTOZOA Methods of Locomotion: 3. Metabolic 4. Gliding By: AAKRITI


  2. METABOLIC MOVEMENT In protozoans a pellicle is present in the ectoplasm which is composed of proteinaceous strips supported by dorsal and ventral microtubules In many protozoans these protein strips can slide past one another, causing wriggling motion This wriggling motion is called as metaboly or metabolic movement.


  3. This movement is mainly caused by the change in the shape of the body This metabolic movement is observed in most of the sporozoans at certain stages of life cycle These kinds of movement are also referred to as Gregarine movements as this movement is the characteristic of most of the gregarines.


  4. GLIDING MOVEMENT The zigzag movement in the protozoans brought about by the contraction and relaxation of myonemes present below the pellicle in the ectoplasm is called as the gliding movement. The movement by gliding is comparatively small Myonemes are the contractile fibrils which are similar to the myofibrils . This kind of gliding movement is shown by flagellates, Sporozoans, Cnidospora and some ciliates


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