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Leaf Structure

This will help you remember the structures of a leaf and their functions.

StructureFunction
Cuticle A waxy layer that prevents water loss through evaporation
Upper Epidermis The upper outer layer that has tough, irregularly shaped cells with thick outer walls that resist tearing and serves as protection
Palisade Mesophyll A layer of cells containing closely-packed cells that absorb light that enters the leaf
Spongy Mesophyll A loose tissue that has many air spaces, which exchange gas with the exterior
Xylem Tissue that distributes water from the roots throughout the plant
Phloem Tissue that distributes nutrients and carbohydrates produced by photosynthesis throughout the plant
Lower Epidermis The lower outer layer that has tough, irregularly shaped cells with thick outer walls that resist tearing and serves as protection with abundant stomata
Stoma Small opening in the lower epidermis that allows carbon dioxide, oxygen, and water to diffuse in and out of the leaf, and prevents water loss
Guard Cells Highly specialized cells that surround and control the opening & closing of the stomata, and regulate gas (especially carbon dioxide and water) exchange
Created by: 0655154
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