The invisible physics of how plants defy gravity to drink
In short: Plants move massive amounts of water against gravity using a sophisticated system of cellular pathways and physical forces. This video breaks down the journey from soil to leaf, explaining the mechanics that keep forests standing.
Water enters roots through hair cells via osmosis and the active transport of mineral ions. From there, it travels through two distinct routes: the apoplast (through cell walls) and the symplast (through the cytoplasm). A critical barrier, the Casparian strip, regulates this movement by forcing water into the symplast.
Once in the xylem, water moves upward driven by the cohesion-tension theory. This relies on cohesion (water molecules sticking to each other), adhesion (water sticking to xylem walls), and transpiration pull. The process concludes at the leaves, where evaporation and diffusion create the tension necessary to pull water from the roots.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: A-Level Biology - Water Transport in Plants - Root Pathways | Xylem | Transpiration (2027/28 exams)
To cite this card, link to https://intellectplus.co.uk/app/science-a-level-biology-water-transport-in-plants-root-pathways-xyle.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in Science · Latest · A–Z · All topics
