Leaves
Anatomy of a Leaf
Anatomy of a Leaf
• Dermal tissue – leaves
are covered with a waxy
covering called a cuticle
to help prevent water
loss.
• Stoma are openings in
the epidermis that
allows water and gases
to pass through
Anatomy of a Leaf
• Vascular tissue – xylem
and phloem are
bundled as veins
• Ground tissue – called
mesophyll is where
photosynthesis takes
place
Transpiration
• Loss of water through
the leaves
• Lost water can be
replaced by water being
drawn from the xylem
• Helps cool off leaves on
hot days but can
threaten a leaf’s
survival if water is
scarce
Gas Exchange
• Carbon Dioxide and
oxygen pass through
the stoma during
photosynthesis
• Guard cells surround
the stoma and regulate
the opening and closing
of the stoma.
How Water Moves Up A Plant
• Transpiration is a
major force of
water transport.
• Water’s
properties of
cohesion and
adhesion.
Label simple leaf