Writing a Good Homeostatic Essay: Know the Essentials
Homeostasis is one of the key biology concepts that aims to describe the survival of living organisms in an environment, as well as explain the mechanisms of cell survival within the organisms. A homeostatic essay is one of the most popular assignments in the academic curriculum of the students taking biology classes. If you are willing to boost your writing proficiency and impress your tutor with a well-written homeostatic essay, just keep reading our guide.
In its essence, homeostasis is a self-regulating process that helps various biological systems to preserve stability when they adapt to surrounding conditions that are optimal for their survival. In case homeostasis passes successfully, the life circle continues, whereas unsuccessful homeostasis leads to deaths. The stability can be achieved only when reasonable consistent conditions dominate.
The main principles and mechanisms of homeostasis can become subjects for various essays in psychology and physiology. When working on their papers, students are supposed to figure out what are the basic attributes of living organisms. For instance, you may write your essay on the human body’s maintenance of the stable temperature level and chemical balance as the best representation of homeostasis.
Since homeostasis topics are pretty popular among students, we highly recommend you have a look at the homeostatic essay sample provided below:
Homeostatic Balance within the Body
In order to remain healthy, the human body must be regulated in a manner to maintain a constant inner balance under constantly changing external circumstances. To describe this process, the term "homeostasis" is used. Cardiovascular system provides all the metabolic processes in the human body and is a component of various functional systems, determining the homeostasis. The basis of blood circulation is the cardiac function.
The cardiovascular system is the heart, blood and blood vessels. Vessels, diverting blood from the heart are called arteries, and veins are delivering it to the heart. Cardiovascular system ensures the movement of blood through the arteries and veins and provides blood flow to all organs and tissues, bringing them oxygen, nutrients and outputting metabolic products. It relates to a system of closed type; that is the artery and vein, therein interconnected by capillaries. The blood never leaves the blood vessels and the heart; only partially plasma seeps through the walls of capillaries and bathes the tissues, and then returned to the blood stream. Heart is the symmetrical hollow muscular organ, about the size of a fist of the person. The heart is divided into right and left parts, each of which has two chambers: an upper (atrium) for collecting blood and lower (ventricle) with inlet and outlet valves to prevent the backflow of blood. Wall and septum of the heart is a muscle complex layered structure, called the myocardium.
The heart has the unique property of self-excitation: that is, the pulses for systole are generated within it. Supposing a person removes an animal heart and connects it to a heart-lung machine; it will continue to heartbeat, being devoid of any kind nerve connections. This property provides an automatism cardiac conduction system, located deep in the myocardium. It is able to generate its own ones and to conduct electrical impulses, coming from the nervous system, causing excitement and myocardial contractility. The plot of the heart in the wall of the right atrium, where there are impulses that cause rhythmic contractions of the heart, is called the pacemaker. Nevertheless, the heart is associated with the central nervous system and nerve fibers; it is innervated by more than twenty nerves. What do they seem to be if the heart can shrink itself?
Nerves carry out the function of regulation of cardiac activity, which provides another example, maintaining a constant internal environment (homeostasis). Cardiac activity is regulated by the nervous system: some nerves increase the frequency and strength of heart contractions, and others reduce it. The pulses on these nerves come to the pacemaker, causing it to work harder or vice versa. When to cut both nerves, the heart will still shrink but at a constant rate, as it will no longer be able to adapt to the needs of the organism. These nerves strengthen or weaken the heart's activity, and are a part of the autonomic (or independent) nervous system that regulates involuntary functions of the body. An example of such regulation is a response to the sudden fright – the person feels that the heart "freezes". This is an adaptive response of avoiding danger.
Homeostasis is the ability of an open system to regulate its internal environment, so as to maintain its consistency by a variety of corrective actions, guided by regulatory mechanisms. To sum up, it should be said that cardiovascular system plays an indispensable role in the process of homeostasis maintenance in different organs and tissues. The movement of blood through the capillaries provides a constant exchange between the plasma and interstitial fluid. Extracellular fluid consisting of plasma and extracellular fluid is constantly agitated, while maintaining almost complete homogeneity in any part of the body. Thanks to the cardiovascular system, all the body systems are interconnected.