The CNS consists of the brain and spinal cord, which occupy the dorsal body cavity and act as the integrating and command centers of the nervous system The structural classification, which includes all of the nervous system organs, has two subdivisions- the central nervous system and the peripheral nervous system. We only have one nervous system, but, because of its complexity, it is difficult to consider all of its parts at the same time so, to simplify its study, we divide it in terms of its structures (structural classification) or in terms of its activities (functional classification). The nervous system does not work alone to regulate and maintain body homeostasis the endocrine system is a second important regulating system. It can help stimulate or inhibit the activities of other systems to help maintain a constant internal environment. This function depends on the ability of the nervous system to detect, interpret, and respond to changes in internal and external conditions. The brain is the center of mental activity, including consciousness, thinking, and memory. It then effects a response by activating muscles or glands (effectors) via motor output. It processes and interprets the sensory input and decides what should be done at each moment, a process called integration. Much like a sentry, it uses its millions of sensory receptors to monitor changes occurring both inside and outside the body these changes are called stimuli, and the gathered information is called sensory input. To carry out its normal role, the nervous system has three overlapping functions. Anatomy of the Parasympathetic Division.Gray Matter of the Spinal Cord and Spinal Roots.Protection of the Central Nervous System.Its signaling device, or means of communicating with body cells, is electrical impulses, which are rapid and specific and cause almost immediate responses. Every thought, action, and emotion reflects its activity. The nervous system is the master controlling and communicating system of the body.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |