Looking at Leaves
Leaf
Parts of leave you can see :
1. blade and petiole
Stomata
•Guard cells take water in by diffusion
•When swollen with water the pulls apart the
stoma and opens it
Stoma
When the guard cells lose water they move back together closing the stoma to
prevent water loss.
Stoma and Guard cells help leaves handle water.
Plant roots
Plants get minerals and water from the soil through their roots
Veins called xylem carry water and mineral from the roots to the leaves.
Phloem carry food from leaves to rest of plant.
Vascular system
Vascular Tissues: Xylem tissue transports water and
dissolved minerals to the leaves, and phloem tissue
conducts food from the leaves to all parts of the plant.
Transpiration
Process by which water vapor can escape from
inside the leaf
Mesophyll - photosynthesis
Place where
photosynthesis
take placemesophyll cells
contain
chloroplast