The Human Nervous System

Among various types of organ systems, the nervous system is one of the most important one in human body. It is responsible for producing, controlling and guiding our thoughts and responses to the world around us according to James W. Pennebaker (2012). During embryological development, the cells that form nervous system are incredibly specialised and work complexly than the cells that form skin or other body parts. Neurosecretory cells are one of the examples of specialised nervous system cells that produce neurosecretions. Neurosecretions are hormones which carry information from sensor cells to target cells and they can be released directly into the bloodstream

The nervous system is a chain of interconnected nerve fibers which is constructed by the central nervous system and Peripheral nervous system. The job of the nervous system is to send messages from the brain and spinal cord to different parts of the body.

We will see that the body is controlled by an information highway known as the nervous system. A collection of hundreds of billions of specialized cells that transmit information between different parts of the body, a collection of

1.What are the 2 main divisions of the nervous system and the basic structures that make

1.1. Identify 2 conditions that may lead to an acute illness of the neurological system.

The central nervous system (CNS) that is one of the main parts of the nervous system in the body which consists of the brain and spinal cord. [1] Unlike the other systems, CNS controls many jobs at the same time. Some of these functions are controlling voluntary movements such as walking and involuntary movement such as digestion. [1] “It is also the core of our thoughts, perceptions, and emotions.” [1] Unfortunately, there are many diseases that can disable CNS partially or even totally, and one of these diseases is multiple sclerosis (MS). This essay will define MS and cover the main characteristics, the symptoms, and the types that exist.

The Muscular and Nervous Systems of our body are two of eight major body functional systems that help us maintain homeostasis or in a chemical balance within our bodies. When the body cannot maintain homeostasis there is usually some sort of sickness or disease that is targeting one of our major body functions. An example of two diseases that could affect our homeostasis within our Muscular and Nervous System are Hydrocephalus and Dystonia.

Because the brain plays a big part in the nervous system, there is a lot not known about it. Many believe that it might have some relation to dreams and self conscious. But so far what we know is that the nervous system helps us communicate with the outside while controlling the insides of our body. The nervous system is important because it is connected to our entire body, keeping us alive.

Our nervous system and brain interact as we cope with our immediate environment. Thus, it transmits and receives our sensory inputs such as sounds, sight, smells and feelings. One end of each neuron on the nerve endings are enclosed in a structure created to sense a specific stimulus. Sending sensory information to the brain or spinal cord is performed by the nervous system. Nervous system is divided into two main systems: Central nervous system and Peripheral nervous system (Saladin, 2014). The central nervous system consists of the spinal cord and brain, the brain which is divided into four lobes (parietal, frontal, temporal and occipital). Spinal cord and brain work together even though there are some occasions when the spinal cord acts earlier before the brain gets the information.

Within the human anatomy, an intricate and complex network of specialised nerve fibres and neurons works in collaboration with the central nervous system and peripheral system, designed to carry out the various actions humans perform every day. The nervous system is also known as the master control unit of the human body, as it operates other major functions such as the circulatory and respiratory systems (Jakab, 2006). It is composed of the central nervous system (CNS) and the peripheral nervous system (PNS). The neurons established within the various sections of the nervous system, is structured with three main parts: a dendrite which is a cluster of branches that operates by receiving information from the

The nervous system contributes so much to the awareness and functionality of the human body and

Even though the brain is the major control center if the body, its job would not be possible without the spinal cord. The spinal cord is the major organ that helps information travel between the body and the brain. Nerves branch in the peripheral system from, either the brain stem or spinal cord, each nerve attaches to a specific area of the torso and limbs it 's responsible for communication to and from those regions. There are three very important

Famous astrophysicist Neil deGrasse Tyson once said, “Everything we do, every thought we’ve ever had, is produced by the human brain. But exactly how it operates remains one of the biggest unsolved mysteries, and it seems the more we probe its secrets, the more surprises we find” (BrainyQuote). The brain is like a galaxy. There is general knowledge of the universe; however, new secrets of planets, moons, and stars are discovered on a daily basis. Similarly, scientists know the basic structure and functions of the brain, but new aspects of the brain are revealed everyday.

There was a common characteristic in all of the experiments performed, that being it involved the nervous system and how it worked within the body to elicit different responses based on different stimuli. Signals in the nervous system were fired, which triggered a response somewhere in the body. This requires two systems to accomplish this, the afferent and efferent systems. The afferent system is the system responsible for sending signals from the receptors to the central nervous system. The efferent system is responsible for sending the response away from the central nervous system to the area in which it wishes to produce an action. Between these two systems is an integrating center, or control center. The afferent brings information from the receptor into the integrating center, the information is processed, and then a response is sent away from the integrating center by the efferent system and the response occurs. “Dynamic task-dependent regulation of reflexes controlled by the central nervous system plays an integral part in neurocontrol of locomotion,” shows how the central nervous system and the reflex arcs that it causes are vital for the body to be able to function (Hofstoetter, U. S., Minassian, K., Hofer, C., et al.) The cerebral cortex also plays a part in the sending and receiving of signals throughout the body. It is located on the

The organs of our body are controlled by many systems in order to function correctly and efficiently in order to survive within the environment we live in. These include the heart, stomach and intestines and other vital organs and body systems. All of the systems in our body are regulated by a part of the nervous system called the autonomic nervous system (ANS). The ANS is part of the peripheral nervous system and it controls many organs and muscles within the body. Rather bizarrely we are unable to determine or feel its presence in our bodies as it is working involuntary, as a reflexive manner. A common example of this involuntary action is best understood when