Pine trees are evergreens with long, needle-shaped leaves. They are widely planted in North America, particularly in northern areas. Pine trees produce cones for propagation of the species. Pines are coniferous trees and there are about 100 or so species of pines world wide.
The nervous system has three general functions: a sensory function, an interpretative function and a motor function. 1  Sensory nerves gather information from inside the body and the outside environment. 2  The nerves then carry the information to central nervous system (CNS).
Nervous Tissue-Structure and Function. Nervous tissue, a component of nervous system, is made up of many neurons and supportive cells, called neuroglia. The main function of nervous tissue is to perceive stimuli and generate nerve impulses to various organs of the body. Let's get to know its structure and functions in detail. Advertisement. The human brain is the most awe-inspiring and fascinating organ in the human body.