A pore or pore surrounded by two crescent-shaped guard cells located in the leaves and young green stems of plants is called stomata. The lower skin of the opposite-sided leaves and the two skins of the equilateral leaves have stomata. The aerial parts of plants such as leaves, shoots, petals, fruits etc. have stomata. Below each stomata is a large stomata or stomata. Guard cells contain chlorophyll and participate in photosynthesis.