BRAINCAKETranspiration
Transpiration is the loss of water vapour from the aerial parts of a plant, mainly from the leaves. Most of it is lost through the stomata, small pores in the leaf epidermis, with a small amount lost through the waxy cuticle.
The process happens in three stages:
1. Water moves from the xylem in the veins into the mesophyll cells and their cell walls.
2. Water evaporates from the surfaces of the cell walls of the spongy mesophyll cells into the air spaces inside the leaf. The air spaces become saturated with water vapour.
Sign in free to see the rest of this lesson, the R.E.C.I.P.E. recall steps and the quiz
BrainCake is free. Make an account in seconds and pick up where this page stops.
Key terms in this lesson
- guard cell
- One of a pair of specialised epidermal cells that surround a stoma and control its opening and closing by changing shape.
More in Transport in Plants
- Phloem
- Root Hair Cells
- Symplast Pathway
- Apoplast Pathway
- Cohesion-Tension Theory
- Adhesion and Capillarity
- Modelling Transpiration
- Measuring the Rate of Water Uptake
All 21 lessons in Transport in Plants · All Edexcel AS-level Biology topics