Transport System in Plants (2)

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The epidermis of a leaf

Is made up of a single layer of epidermal cells covering both the upper and lower surfaces of the leaf, namely upper epidermis and lower epidermis

Function of epidermal cell

Secrete a waxy cuticle which covers the outer surface of the leaf to reduce water loss during transpiration

Function of the stoma in transpiration (1)

Most of the water which is lost during transpiration in plants occurs through the stomatal pores found in the epidermis of the lea

unction of the stoma in transpiration (2)

When photosynthesis takes place during the day, the stoma is usually open

Function of the stoma in transpiration (3)

Opening of stoma also causes the plant to lose water through transpiration

Process that causes plants to lose water (1)

Transpiration

Process that causes plants to lose water (2)

Exudation (Guttation)

Definition of exudation (guttation)

Is the water loss from plants in liquid form through hydathodes that are always open at the edges of the leaves

Timing of guttation

Guttation usually occurs at night or when the air humidity is high

Process that forms dew drops

Dew drops are formed from the condensation process of water vapour in the atmosphere into water

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