English: This diagram illustrates capillary action in plants, which allows water to move upward through the xylem from the roots to the leaves. This upward movement is driven by cohesion (hydrogen bonds between the partial positive of one water molecule to the partial negative of another water molecule) and adhesion (attraction between water molecules to other polar molecules). The inset on the top right shows a close-up of these molecular interactions. Blue dashed lines represent hydrogen bonds between water molecules (cohesion), while yellow dashed lines indicate the adhesive forces between water and the xylem wall (adhesion). Together, cohesion and adhesion generate the capillary action and tension required to pull water up through the plant during transpiration.