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).
The brain sends messages through the spinal cord and nerves of the peripheral nervous system to control the movement of the muscles and the function of internal organs. The basic working unit of the nervous system is a cell called a neuron.The human brain contains about 100 billion neurons.he brain is made up of many networks of communicating neurons. In this way, different parts of the brain can âtalkâ to each other as well as work together to send messages to the rest of the body. The nervous system consists of two main parts: the central nervous system and the peripheral nervous system: