The role of the mesophyll in plant leaves is crucial for the process of photosynthesis. This tissue, located between the upper and lower epidermis, contains chloroplasts that capture sunlight and convert it into chemical energy. The mesophyll is typically divided into two layers: the palisade mesophyll, which is densely packed for maximum light absorption, and the spongy mesophyll, which has air spaces for gas exchange. This structure facilitates the uptake of carbon dioxide and release of oxygen, playing a vital role in the plant's respiratory processes and overall health.