Essay Autonomic Nervous Systems : The Nervous System

Essay Autonomic Nervous Systems : The Nervous System

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The Autonomic Nervous System

Over tens of millions of years of evolution, the human body has effectively become one of the most intricate and advanced mechanisms that mankind has ever discovered. It has developed natural abilities and functions that continue to astonish the science community everyday. One of the most awe-inspiring structures found within the human body is the autonomic nervous system, which is largely responsible for regulating physiological processes and maintaining an essential homeostasis within the body in order for it to survive. The autonomic nervous system controls all of the functions human bodies perform unconsciously, or automatically, and without its help, people would not be able to walk, eat, or even breathe. The autonomic nervous system is separated into two complimentary divisions, the sympathetic division and the parasympathetic division, which are constantly striving to give the body the balance it requires to function properly and react to its surroundings.
The human body 's nervous system is composed of the central nervous system, which includes the brain and the spinal cord, and the peripheral nervous system, which consists of nerves that connects organs and tissue to the central nervous system. The autonomic nervous system is a subdivision of the peripheral nervous system, and delivers messages to and from the central nervous system to tissue whose muscle is involuntary, such as cardiac and smooth muscle found in the heart and the digestive tract. The autonomic nervous system is extremely vital as it “controls BP, heart rate, body temperature, weight, digestion, metabolism, fluid and electrolyte balance, sweating, urination, defecation, sexual response, and other processes”(Low 1). The aut...


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... and structurally. Functionally, I learned in greater detail how nerve fibers communicate by means of secreting neurotransmitters which are then are received by receptor cells of the tissue. As well as how chemicals like norepinephrine and acetylcholine are secreted by different nerve fibers, and have unique effects on certain tissues. And structurally, I am able to identify some of the anatomy of the autonomic nervous system, like how ganglia form a sort of crossroads for information between nerve fibers. Also
how specific areas where preganglionic fibers are found along the spinal cord classify them as part of the sympathetic or parasympathetic system. Learning and applying all of this information to how I view the human body has allowed me to gain a new perspective on how complicated intelligent life on Earth can be and how incredible it really is at the same time.

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