Protoplasm always exhibits dynamic movement. The dynamic movement of protoplasm is called cyclosis or cyclosis. It exhibits zig zag oscillations, called Brownian oscillations. It exhibits two types of movement.
1. Unidirectional Cyclosis: The movement in which the protoplasm rotates in one direction in a specific direction around a single cavity is called unidirectional cyclosis. The movement of the protoplasm of leafhoppers is unidirectional.
2. Multidirectional Cyclosis: The movement in which the protoplasm rotates irregularly in different directions around several cavities is called multidirectional cyclosis. The movement of the protoplasm of Tradescantia is unidirectional.