Anatomy of a Leaf Blade

Anatomy of a Leaf Blade

    - like a sandwich
    - epidermis
    - palisade cells of mesophyll
    - veins

Mesophyll contains the palisade cells

Palisade cells are spongy cells that are packed with carbon dioxide, oxygen, and water vapor. Waxy cuticle layer on epidermis prevents evaporation. Pores of the leaf surface are called the stomata.

How many stomata are involved?

-39,000 stomata per sq cm of lower epidermis - apple

- 25,000 stomata per sq in of bean

- 45,000 orange and 27,000 on a pumpkin leaf

Stomata openings permit gases to enter the leaf. Stomata routinely close at night.






Botany for Gardeners Plant Term List

acid rain
aerobic respiration
alkaloid
atom
carbohydrate
carbon-dioxide fixation
cellular respiration
germination, 25, 26, 29, 31, 32, 111, 140, 145
glucose
leaf
inflorescence
nutrient uptake 18, 30, 36, 71, 117
palisade cell 74, 75
photosynthesis
phototropism
pollen 194
rhizome 112, 123

vascular bundle 57-58
water uptake 153, 156