A tree's leaves are also responsible for the twin functions of respiration ... leaf blade is composed of tissue layers, each having an important part to play in a functioning leaf.

Each aspect has a name and is used as part of the ... The bark is a tree's natural armor and protection from external threats. Bark also has several physical functions; one is ridding the tree ...

The nervous system is formed of two parts that are integrally linked with each other ... are the major functions of the cerebral cortex. Cortex literally means "bark" (of a tree) in latin and ...