Here is a video reviewing the process of plant transport…

Make sure you know the three forces that allow plants to move water through the plant:

Root Pressure (including Osmosis)

Capillary Action

Transpiration

Typically this goes from root to leaf.

Nutrient flow (sugars) typically flow from leaves to roots. Gravity helps out here and the phloem moves materials from where they are made to areas of storage (called sinks).

In both cases materials are moving from HIGH concentration to LOW concentration (remember your concepts of diffusion)