Leaves Flashcards
Plant Unit
What are the functions of leaves?
They are the main photosynthetic systems.
They also host the location where Gas exchange occurs.
What’s the Blade?
The blade is a thin flattened section of the leaf.
What’s the Petiole?
The Petiole is the stalk that attaches the stem to the blade.
It is covered by the Epidermis and Cuticle to create a ‘water resistant’ barrier.
What’s the Stomata?
The Stomata is the region that allows for Gas Exchange. It is usually found in the ‘Lower Epidermis’.
The Opening/closing is regulated by the Guard Cells.
it has chloroplasts.
What happens when Guard cell = Opened?
It allows for Gas Exchange as well as the plant to lose water.
What happens when Guard Cell closes?
Water Concentration in the Guard cells drop.
Water is conserved meaning Gas cannot be exchanged.
What’s the Mesophyll?
The Mesophyll is region that contains Photosynthetic cells.
What’s the Palisade Mesophyll?
It is a region in the leaf that is rich in Chloroplasts and is the primary region of Photosynthesis.
They are shaped like tightly packed bricks.
What’s the Spongy Mesophyll?
The Spongy Mesophyll is a region between the Palisade Mesophyll and the lower epidermis.
It allows for Gas Exchange. It also contains fewer Chloroplasts.
They are irregular in shape.
