Study the given diagram: Name the parts ‘A’ and ‘B’ and state one function of each

Study the given diagram:
image
Name the parts ‘A’ and ‘B’ and state one function of each.
Answer:
A —> Stomatal pore
Function: Massive amounts of gaseous exchange takes place in the leaves through these pores for the purpose of photosynthesis.
B —> Guard cell
Function: The opening and closing of the stomatal pore is a function of the guard cell.