Internal Structure of the Leaf

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Presentation transcript:

Internal Structure of the Leaf

a) Cuticle: Waxy layer water proofing upper leaves. b) Upper epidermis: Upper layer of cells. No chloroplasts. Protection.

c) Palisade Mesophyll: Tightly packed upper layer of chloroplast containing cells. d) Spongy Mesophyll: Lower layer of chloroplast containing cells. Air spaces around them. \ e) Lower Epidermis: Lower external layer of cells in leaf.

f) Vascular Bundle: Bundle of many vessels (xylem and phloem) for transport. g) Xylem: Living vascular system carrying water & minerals throughout plant. h) Phloem: Living vascular system carrying dissolved sugars and organic compounds throughout plant.

i) Guard Cells: 2 cells surrounding stomata that control rate of gas & water exchange. j) Stomata: Opening between guard cells for gas & water exchange. (See Diagram below.)

i) Guard Cells: 2 cells surrounding stomata that control rate of gas & water exchange. j) Stomata: Opening between guard cells for gas & water exchange. (See Diagram below.)