The tallest trees on Earth have an amazing system to circulate water and nutrients. Life processes - Green plants - Parts of a plant Learning Points Leaves absorb sunlight. Root hairs absorb water and nutrients. Trunk transport water and nutrients. Xylem and phloem cells transport water and food. A Twig Context Film. Reinforce and extend the learning required by the curriculum. Twig’s context films show abstract concepts in action in the real world.