Cross Section of a Leaf

CROSS SECTION OF A LEAF Name ______Honors Bio / Amatuzzi 1) NAME each part described below (see word bank) 2) LABEL the structures on the figure. 3) COLOR, using the code provided after each description

WORD BANK: palisade mesophyll cuticle guard cells stoma epidermis spongy mesophyll bundle sheath chloroplast phloem xylem vein

1. ______cells that open and close leaf openings – yellow 2. ______layer where most photosynthesis occurs - dark green 3. ______layer where gases diffuse easily around cells - medium green 4. ______clear, protective layer of clear cells - white 5. ______transport tissue carries water from roots, up plant, and into leaf – blue 6. ______transport tissue carries dissolved food in sap throughout plant – orange 7. ______waxy, waterproof coating – beige 8. ______layer of cells surrounding vein- red NAME these structures only: 9. ______“vascular bundle”, grouped transport tissue in a plant 10. ______opening in leaf surface for gas exchange and water release 11. ______organelle in plants where photososynthesis takes place

LABEL structures in figure

A ______

B ______

C ______

D ______

E ______

F ______

G ______

H ______Label these structures in a cross-section from a micrograph of a REAL leaf

Open (left) and closed (right) stomata. What are the dots? ______LABEL the parts indicated above.

Leaf epidermis (100X) LABEL: guard cells (one set) stoma (stomata) epidermal cell wall epidermal cell cytoplasm

COLOR any cells that contain chloroplasts