The movement of water from higher water concentration to lower water concentration through a semi-permeable membrane is called Osmosis.
For example,
Consider a container which is partitioned by the semi-permeable membrane and sugar solutions are added in both partitions. One side has a concentrated sugar solution while the other has a dilute sugar solution. So, the concentration of water in the diluted solution is more compared to the concentrated solution. After some time, water molecules start moving from the side of high concentration to the side of low concentration. This movement will occur till the concentration of water is balanced and equalized on both sides. This process is called Osmosis.
Summary
| Transportation of Molecules | Molecules are continuously transported in and out of the cell. Transportation of the molecules is carried out by two processes:
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| Osmosis | The movement of water from higher water concentration to lower water concentration through a semi-permeable membrane is called Osmosis. |