Movements of Protoplasm & It's Importance

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In the cell, protoplasm moves in a various direction and various types, this is known as movements of protoplasm. The movements of protoplasm are following types –

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  1. Cyclosis
    • Rotation
    • Circulation
  2. Ciliary Movement
  3. Amoeboid Movement  

1.  Cyclosis  

the movement of protoplasm in the cell is called as Cyclosis. Cyclosis is two types -

            a.  Rotation

            b.  Circulation

a. Rotation 

When the protoplasm in a cell moves around a single vacuole in one direction, it is called rotation. Example – in Hydrilla or Vallisnaria leaf cells.

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Rotation in Hydrila cell

b. Circulation 

When a cell has more than one vacuole and the protoplasm moves around the vacuoles in different directions, it is called circulation. Example – in Tradescantia.

Circulation in Tradescantia


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2. Ciliary Movement 

In this the cell moves with the help of cilia. Example – in Chlamydomonas , in male gamets of Moss & Fern.

Ciliary Movement

3. Amoeboid Movement 

In this the protoplasm moves as a mass. This type of movement can be observed in Amoeba, Leucocytes and gamets of Slime molds & Spirogyra.

Amoeboid Movement

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Brownian Movement

The Brownian movement is a specific characteristic of all types of colloidal solutions. It is seen by the Robert Brown in 1827 and after his name it is called as Brownian movement. Brownian movement found in Sol stage of protoplasm. Suspended particles of protoplasm shows Brownian movement because Due to the presence of uniform charge on the particles in Sol stage, they keep colliding with each other while moving in different directions. This movement is known as Brownian movement.

The viscocity of protoplasm decreases when the temperature is increases, due to which the Brownian movement increases fastly.


Brownian Movement









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