Learn all about the parts of a plant. Life processes - Green plants - Parts of a plant Learning Points Leaves use water, carbon dioxide and sunlight to carry out photosynthesis. Root hairs absorb water and nutrients from the soil. The stem of a plant supports growth and transports water and nutrients. A Twig Curriculum Film. Delivering key learning points. Get straight to the facts in just three minutes – directly linked to core learning, Twig's curriculum films will fit neatly into your lesson plans.