Leaf Parts & Function

 

Lower epidermis outmost tissue on the lower side of the leaf; protects the leaf

 

Upper epidermis outmost tissue on the upper side of the leaf; protects the leaf

 

Palisade layer rows of elongated cells in the upper center of leaf; site of photosynthesis

 

Cuticle waxy layer on the covering the epidermis; holds in moisture, prevents too much absorption of water

 

Stoma opening between the guard cells; allows for gas exchange and some water

 

Guard cells surround the stoma; control the opening and closing of the stoma

 

Vein supply support for the leaf; contain the xylem and the phloem

 

Spongy layer irregular shaped cells in lower center of leaf; absorbs gas & some water

 

Air space space in the spongy layer; contain gases

 

Xylem found in the vein; transports minerals and water from roots to shoots

 

Phloem found in the vein; transports sugar & other products of photosynthesis from leaves to other parts of the plant

 

Chloroplast cells in the leaves that contain chlorophyll; trap light energy and convert it to chemical energy

 

Mesophyll all of the middle tissue of the leaf