When a plant opens and closes its stomata, it is maintaining

When a plant opens and closes its stomata, it is maintaining its respiration and helps the Earth’s breathable atmosphere. Stomata (stoma) by dictionary definition is a small opening on a plants’ epidermis (mostly on leaves) with which gas exchange happens, carbon dioxide in, oxygen out.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;