Biology·Organisation & maintenance · NSSCO 3.7
Transport in plants
Narrated lesson · press play
How a plant moves water and food without a heart — the xylem and phloem, the transpiration stream that pulls water up from the roots, the factors that speed it up, and how desert plants survive.
What you'll learn in this lesson
By the end you should be able to (NSSCO Biology 3.7):
- Describe the structure of a root and stem (root hairs, cortex, xylem, phloem)
- Explain how water enters the root, moves up the xylem, and leaves through the stomata
- Define transpiration and explain how temperature, wind, humidity and light affect its rate
- Describe how and why wilting occurs, and how xerophytes reduce water loss
- Define translocation as the movement of sucrose and amino acids in the phloem
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Quick revision
Revise this in 5 minutes
Miss Rachel and Mike talk through the whole topic — with the figure and working drawn live.
Hands-on lab
Measure the rate of transpiration with a potometer in 3D