Leaf Structure and Photosynthesis Flashcards
In plants a thick waxy layer on exposed outer surfaces of cells that protects them against water loss and injury
Cuticle
Outer layer of the skin
Epidermis
Layer of tall column-shaped mesophyll cells just under the upper epidermis of a leaf
Palisade Mesophyll
Loose tissue beneath the palisade layer of a leaf; has many air spaces between its cells
Spongy Mesophyll
Vascular tissue that carries water upward from the roots to every part of a plant
Xylem
Vascular tissue responsible for the transport of nutrients and the carbohydrates produced by photosynthesis
Phloem
Opening in the underside of a leaf that allows carbon dioxide and oxygen to diffuse into and out of the leaf
Stoma
Specialized cell in the epidermis of plants that controls the opening and closingn of stomata by responding to changes in water pressure
Guard Cells
A layer of cells in plant leaves and stems that form a vascular bundle
Bundle Sheath
What are the main organs of food production and photosynthesis in green plants?
Leaves
Why are leaves flattened?
To have a large surface for sun exposure
What is the flattened part of a leaf called?
blade
What is the leaf attached to the stem by?
a petiole
What does the petiole do?
carry water to the leaf (xylem) and carry food away from the leaf (phloem)
Name the three types of leaf tissues
epidermal, mesophyll, vascular
