This animation traces how water rises through a plant's xylem, driven by evaporation from leaf stomata. It shows adhesion, water molecules clinging to xylem cell walls, and cohesion, water molecules bonding to each other through hydrogen bonds, forming an unbroken column. As surface water evaporates, tension pulls the whole chain upward, so adhesion anchors the column while cohesion transmits the pulling force, letting water move against gravity without a pump. Useful for biology students studying plant transport systems.
Narrated · 16:9 · Preview before teaching · automatic layout checks do not establish subject accuracy
What is transpirational pull? And tell me if the water sticks to xylem tissues or xylem walls, then how can water molecules go upward if they are stuck to the walls of xylem?