How Water Moves through plants?

All plants are alive and need nutrients and water to survive. But how do nutrients and water move through the plant? 

Do plants absorb water through their leaves? stem? root? 

Does water move in a specific direction? for example from root to leaves or from leaves to root?

How is this movement achieved? What forces and processes are involved?

 Project description:
Design an experiment to identify the reasons that might affect the movement of water in plants. Perform the experiment, record the results and draw a conclusion.
 Details of this project
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