Essay on Nervous System

Submitted By solemly
Words: 1802
Pages: 8
Open Document
Nervous system

Moving, breathing, the ability to physically feel; one may wonder how. How are all these things, these simplified actions, possible? The answer that is giving is simplistic in nature and yet is so complex in actuality. The simplistic answer is the Nervous system. The Nervous system, however, is never simple: the organs, the location (while it may be simple in theory the things that could happen because of it are not), the amount of time dedicated to learning to help people with something wrong involving it, the diseases, the procedures and even the words; are not simple, and they most likely never will be. There are several overall significant organs within the nervous system and they are all very important. One of these significant organs are the cranial nerves. There are twelve cranial, or at least twelve main ones. One: the olfactory nerve—a purely sensory nerve—transmits the sense of small and allows it to be processed within the brain. Two: the optic nerve—another purely sensory nerve—is for transmitting visual information to the brain. Three: the oculomotor nerve—mainly a motor oriented nerve—controls the movement of the eyeball and the eyelid. Four: the trochlear nerve—another mainly motor oriented nerve—turns the eyes downward and laterally. Five: the trigeminal nerve—both a sensory and motor oriented nerve—is responsible for the muscles for chewing and, also, for receiving sensation from the facial area. Six: the abducens nerve—also mainly motor oriented—turns the eyes laterally. Seven: the facial nerve—both a sensory and motor oriented nerve—controls the secretion of tears and saliva and most of the facial movements. Eight: the vestibulocohlear nerve—mostly a sensory nerve—is an auditory nerve that controls hearing and equilibrium sensation. Nine: the glossopharyngeal nerve—both a sensory and motor oriented nerve—receives taste from one-third of the tongue, proves movement for the stylopharyngeus (a muscle that stretches from between the styloid process and the pharynx) and senses the carotid blood pressure. Ten: the vagus nerve—both a sensory and motor oriented nerve—senses aortic blood pressures, slow heart rates, and stimulates digestive organs, it also helps with the sense of taste. Eleven: the accessory never(also referred to as the spinal accessory nerve of the cranial accessory nerve)--a mainly motor oriented nerve—controls trapezius and sternocleidomastoid, muscles and swallowing movements. And finally, twelve: the hypoglossal nerve—another mainly motor oriented nerve—controls the movements of the tongue, therefore allowing speech. Other significant organ within the nervous system are: the spinal nerves, neurons, the brain, the brain stem, and the spinal cord. The spinal nerves rely all impulses, information and sensations from around the entire body—internally and externally—to the brain for processing and so the body can take what action is say fit. Another important organ are the neurons, which allow rapid transition of signals, whether they be electrical or chemical, to other neuron through the synapses or inter-neurons—which are membranes that connect two or more neurons.. Sensory neurons transmute physical stimulation to the CNS, while the motor neurons transmute active muscles and glands or information going out from the CNS. Then there is the brain, the epicenter. The brain is the center of all commands and monitors all conscious and unconscious processes of the body. It coordinates all voluntary and involuntary movements along with organs. There is also the brain-stem, which is located near the base of the skull and connects to the cerebrum with the spinal cord. The brain-stem actually consists of the midbrain, medulla oblongata, and the pons and the whole is used to transmit signals between the brain and the spinal cord. Motor control comes from the signals sent from the brain to the body—which are coordinated by the brain-stem—it also controls autonomic functions that
Show More

Related Documents: Essay on Nervous System

The Nervous System Essay

…...…Isaiah Barnes Presents The Nervous System There are two main Parts of the nervous system Central nervous system • Made up of the brain and the spinal cord Peripheral nervous system • Made up of sensory neurons, clusters of neurons called ganglia, and nerves connecting them to each other and to the central nervous system. These regions are all interconnected by means of complex neural pathways. Central nervous system The Cerebellum Click icon to add picture The cerebellum is the part…

Words 512 - Pages 3

Love: Nervous System and a. Nervous Essay

pleasure The Nervous System The body’s speedy, electrochemical ____________________________ system Central Nervous System (CNS) the ____________ and ______________ ______________ Peripheral Nervous System (PNS) the _______________ and ____________ ________________ that connect the central nervous system (CNS) to the rest of the body Nerves neural “cables” containing many ______________ part of the __________________ nervous system connect the _______________ nervous system with muscles…

Words 861 - Pages 4

Nervous System Essay

Nervous and Endocrine System • A neuron is a nerve cell specialized for conducting nerve signals over long distances • Dendrites receive impulses from the other neurons • The impulses are then passed on to the cell body which contains the nucleus • They are then transmitted to the axon, the axon terminal, and finally the synaptic knob • They also contain a neurolimma, which helps it repair itself if it’s injured • A white, fatty myelin sheath covers the axon, which…

Words 814 - Pages 4

Functions Of The Nervous System

N E U R O The Nervous System Function Controls and integrates sensory, motor and autonomic functions Maintains internal homeostasis Enables connection and response to external environment Divisions of the Nervous System Central Nervous System (CNS) Peripheral Nervous System (PNS) The Brain Control Center of the nervous system About 1400 grams/3 lbs Protected by the skull 3 protective membranes (Meninges) Dura Mater – Outter Layer Arachnoid – Middle Layer Pia Mater – Inner Layer Epidural Space…

Words 4825 - Pages 20

Central Nervous System

organs that comprise the body nervous system. It is responsible for controlling the body and communications among its parts. The organ is further divided into two major divisions; central nervous system (CNS) as one section and the other one which is the peripheral nervous system (PNS). The peripheral nervous system has sensory and motor neurons that receive impulses from the rest of the body and its surrounding environments and links it to the central nervous system for integration, and response…

Words 739 - Pages 3

Functions Of The Nervous System

Functions of the Nervous System: The nervous system’s functions include sensory input, integration, control of muscle and glands, homeostasis, and mental activities. For sensory input, the nervous system detects external and internal stimuli through sensory receptors. Some of the stimuli result in sensations we are aware of, such as vision, hearing, smell, touch, pain, body position, and temperature. Other stimuli, such as blood pH, blood gases, or blood pressure are processes at an unconscious…

Words 2061 - Pages 9

Peripheral Nervous System

A. THE NERVOUS SYSTEM 1. What are the central and peripheral nervous systems? What structures are part of each? The central nervous system includes the brain and the spinal cord. This part of the nervous system controls the activity of the nervous system by sensory impulses being transmitted to carry out actions; basically the body’s command system or the boss of the human body. The peripheral nervous system is where the actions are actually carried out. This system contains the nerves. To be more…

Words 1191 - Pages 5

Autonomic Nervous System

The autonomic nervous system has an important role in controlling visceral organs through the actions of operating the smooth muscle, cardiac muscle, and glands. The autonomic nervous system is divided into the sympathetic and parasympathetic division. The sympathetic division, also known as the “fight or flight” system, has short preganglionic and long postganglionic fibers which make this division more efficient at preparing the body for heightened somatic activity. The activation of the sympathetic…

Words 732 - Pages 3

Female Reproductive System And Nervous System

The organ systems that I choose to discuss were the female reproductive system and nervous system. For life to have an ongoing process there must be the process of creating new life. This process is called reproduction. Human beings reproduce in much the same way as other mammals. There is need for both male and female to be involved in the human reproductive process. On the other hand the nervous system is the most complex system in the body. This particular system is well needed for…

Words 861 - Pages 4

Nervous System Research Paper

3. The nervous system is an important part of the human body, meaning that the body cannot function without it. The main functions of the nervous system are receiving sensory input, integrating information, controlling muscles and glands, maintaining homeostasis and establishing and maintaining mental activity. The brain, spinal cord, sensory organs and all the nerves that are involved within these organs, are all part of the nervous system. All these organs are what controls the body, as well as…

Words 886 - Pages 4