Water for Photosynthesis
Plants get the water they need for photosynthesis through their roots. The roots have a type of cell called a root hair cell - these project out from the root into the soil. Roots have a big surface area and thin walls, which allow water to pass through them easily.
Root cells do not contain chloroplasts, as they are normally in the dark and cannot photosynthesise.
Plants need water for other important things such as:
provide dissolved minerals that keep the plants healthy
provide a medium for transporting minerals
keep the plant firm and upright
keep the plant cool and hydrated
allow other chemical reactions to occur in plant cells