<P> Palisade cells contain the largest number of chloroplasts per cell, which makes them the primary site of photosynthesis in the leaves of those plants that contain them, converting the in light to the chemical energy of carbohydrates </P> <P> Beneath the palisade mesophyll are the spongy mesophyll cells, which also perform photosynthesis . They are irregularly shaped cells that have many intercellular spaces that allow the passage of gases, </P>

Explain why palisade cells are found in the upper region of the leaf