A deciduous leaf's structure is divided into two categories, internal and external, with external structures including the blade, the petiole and the stipules and internal structures including the epidermis, the palisade layer, the spongy mesophyll, the vascular bundle, the stomata and the guard cells. Leaf composition differs from tree to tree but adheres generally to these overarching categories.Continue Reading
Leaves absorb light to facilitate photosynthesis, the process by which trees turn light into energy for growth. They also exchange moisture and gas with the atmosphere to keep trees healthy.
A leaf's internal features perform the following functions:
Internal structures have to do primarily with the functions of the leaf and its part as a component of the tree's larger system.
A leaf's external features are organized in the following ways:
Leaves are vital to the health of deciduous trees and are an important part of forest ecology. Decomposing, they reintroduce nutrients to the forest's soil and allow for the growth of their parent trees and of new vegetation and growth.Learn more about Botany