petiole
the slender stem that supports the blade of a leaf
blade
the flat part of a tool or weapon that (usually) has a cutting edge
chloroplast
plastid containing chlorophyll and other pigments; in plants that carry out photosynthesis
stoma
a mouth or mouthlike opening (especially one created by surgery on the surface of the body to create an opening to an internal organ)
epidermis
the outer layer of the skin covering the exterior body surface of vertebrates
transpiration
the emission of water vapor from the leaves of plants
cuticle
hard outer covering or case of certain organisms such as arthropods and turtles
pore
any tiny hole admitting passage of a liquid (fluid or gas)
photosynthesis
synthesis of compounds with the aid of radiant energy (especially in plants)
respiration
a single complete act of breathing in and out
