helps prevent unwanted water loss
Epidermis: In the lower level, this layer of cells contain guard cells and stomata which help regulate gas exchange between the leaf and the environment
Palisade mesophyll: this layer of cells have a high amount of chloroplasts in them . . . why might the top layer of the leaf have more chloroplasts?
Veins: bring water and nutrients around the plant
Spongy mesophyll: air spaces allow diffusion of gases rapidly
Guard cells: open and close to allow for gas exchange and water (transpiration) -- specialized cells