How Does Water Enter A Plant?

Absorption of water and mineral salt take place mainly in the area of the root hair. Each root hair is a fine tube like out-growth of the epidermal cell. It grows in the soil particles. Hence it comes in close contact with the water present in the soil. Dissolved mineral salts are present in the soil water. Therefore the water surrounding each root hair is a dilute solution of mineral salts.  Due to a high surface area: volume ratio of the root hair, the rate of water and mineral absorption is enhanced.

The sap (plant juice) present in the root hair cell comprises of a relatively strong solution of sugars and various salts. The amount of water in the sap is therefore lower than the soil solution (the sap has a lower water potential). Due to this low water potential and the semi permeable membrane of the root hair cell, water enters in the plant by the process of osmosis.  The sap of the cell now becomes more dilute than the sap of the next root hair cell.

Hence water passes by osmosis from the root hair cell into the inner cell.  Similarly the water passes from the inner cells to the cortex. This transfer process continues till water enters the xylem vessels and travels up the plants.

It goes into the roots and it gets sucked into the plant

Through its roots

Through xylem & phylum