Angiosperm is a flowering plant, which forms seeds inside a protective chamber called an ovary. Explain the relationship between tha distribution of tissues in the leaf and their functions. Stomata, stoma singular, are tiny pores which are the only interruptions in the epidermal barrier and are flanked by guard cells. They are usually more numerous on the bottom side of the leaf to minimize water loss.
Guard cells allow gas exchange between the surrounding air and the internal photosynthetic cells.
This is the major avenue for water loss in plants. There are two distinct regions on most dicots. Air spaces are larger in the vicinity of the stomata. Parenchyma cells are equipped with chloroplasts and specialized for photosynthesis. Veins bring xylem and phloem into close contact with photosynthetic tissue.