Anatomy of a Leaf - see coloring worksheet

Functions

Cuticle: waxy covering, prevents water loss
Xylem: vascular tissue, transports water
Phloem: vascular tissue, transports nutrients (phood)
Stomata (stoma): pores used for gas exchange
Guard cells: open and close stomata
Mesophyll: middle tissue, cells have chloroplasts used for photosynthesis, mesophyll consists of the spongy and palisade layers
Epidermis: layer of cells just under the cuticle
Vein: a structure composed of xylem and phloem, veins run from the tips of the roots to the edges of leaves

Anatomy of a Stem

Monocots and Dicots differ in the way their vascular tissue is arranged

Monocot Stem	Dicot Stem
A: vascular bundle (scattered thru stem) B: ground tissue: storage, support	A: epidermis B: vascular bundle (arranged in a ring) C. ground tissue (pith) D. cortex

Tree Rings Form on Woody Stems.

Sapwood: contains vessels that conduct water

Heartwood: vessels no longer conduct water, hard interior support