What is the name of part labelled number H and what is its function?
Stomatal openings allow for the entrance of carbon dioxide and exit of oxygen.
What is the name of part labelled number G and what is its function?
Guard cells function through, turgor pressure, to open and close stoma.
What is the name of part labelled number F and what is its function?
Lower epidermis acts as a protective layer and has openings that allow for gas exchange.