Stomata
It present onn epidermis of leaf and regulate transpiration and gaseous exchange.
Stomatal pores are enclosed by two - dumble cells called guard cells.
Guard cells posses chloroplast and regulate the opening and closing of stomata.
Outer wall of guard cells is thin and inner wall towards pore is thick.
Some epidermal cells becomes specific in their shape and size called subsidiary cells.
Guard Cells and subsidiary cells toghter called stomatal appartus.
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