The human body is an incredible system capable of performing a multitude of different mental functions and muscular actions. In addition to the body's ability to move and reason, the human body also includes the five senses that are involved in everyday life and even nightlife. The body's ability to use the five senses, retain memories, and experience emotions is a result of the body's basic behavioral elements. The body using these basic elements of behavior also gives the impression that they are obvious and simple. However, the basic elements of behavior intermingle and shape together as neurons, which have a remarkable diversity of responses, come together to form a unique and efficient system. In Feldman's (2009) text, the book discusses the structure of the body's neural data system. they are neurons. “Neurons, or nerve cells, are the basic elements of the nervous system. Their quantity is staggering: perhaps up to 1 trillion neurons throughout the body are involved in controlling behavior” (p. 61). Each neuron is composed of dendrites, a cell body, an axon with myelin sheath and vesicles with neurotransmitters. The neuron accepts data from sensory receptors or chemical matches from neighboring neurons through its dendrites, which transfer the data to the cell body. The correspondences that travel through a neuron are electrical in nature. Additionally, the text provides examples of how the cell body sends an impulse, called an action potential, along the axon. The impulse is projected and pushed along its path by the myelin sheath, which is a layer of fatty tissue that encloses the axon. All neurons recognize signals from numerous other neurons. There are two types of signals, one is excitatory, because… middle of paper… The peripheral nervous system or PNS is one of the two basic parts of the body's nervous system. “The peripheral nervous system branches from the spinal cord and brain and reaches the extremities of the body. Made up of neurons with long axons and dendrites, the peripheral nervous system includes all parts of the nervous system other than the brain and spinal cord. The peripheral nervous system is divided into two parts called the somatic nervous system and the autonomic nervous system. The peripheral nervous system acts like a carpenter of the central nervous system. The part of the peripheral nervous system known as the somatic nervous system is made up of cranial nerves and spinal nerves. The nerves of the somatic nervous system supply the muscular system and external receptors; this is part of body control and allows movement (Feldman, 2009 pag 69-70).-