Immune System Essay

710 words - 3 pages

PAGE PAGE 1 Immune System
Immune SystemImmune SystemThe immune system protects our body from the infection of virus, bacteria, fungi and some other parasites. The cells of immune system have the ability to surround the bacteria, kill parasites, tumor cells or viral/bacterial infected cells (Linnemeyer, 1993). The immune system of a human being is remarkable effective. Antigen is a substance which obtains immune response in human body. The parts of an immune system are:Antigen specific (which identify a particular antigen and act against it)Systematic (Works throughout the body)Memory (identifies and accumulates a stronger attack to the antigen next time)Every cell in the immune system displays a marker that is based on the Major Histocompatibility Complex (MHC). The display helps in self or non-self recognition. The non-self cells are treated as enemies and attacked effectively. Sometimes, self cells are attacked by the immune system itself due to the process break down, which is called autoimmune disease. Systemic lupus erythematosus, multiple sclerosis and some types of arthritis and diabetes are some examples of autoimmune diseases (Immune System, 2001).52-62% of human blood is composed by plasma liquid and 38-48% of blood by cells. 7% weight of the body of an average person is constituted by 5 liters of blood. The pH of blood is 7.40, which mean blood is alkaline in nature. Density of the blood is 1.057, which shows it is heavier than water. The immune cells are found in bone marrow mainly. All these properties of blood make it able as a carrier of immune system.Humoral ImmunityHumoral immunity depends on the B-cells of immune system. B-cells are lymphocytes which are responsible for the production of antibodies that works against an antigen. Stem cells of the bone marrow are the population from where B-cells arise. The location of lymphoid is identified in birds that are in the gut and called bursa of Fabricius. But in humans the location is unknown. Some of the researchers have explained the location in the bone marrow. These lymphocytes are called B- lymphocytes (Humoral immunity, 1999).Antibodies are 'Y' shaped molecules. Specific antigens could be bound on the sites of antibodies. They are made up of proteins. One of the...

Find Another Essay On Immune System

The Immune System Essay

677 words - 3 pages The Immune System      The immune system is a group of cells, molecules, and tissues that help defend the body against diseases and other harmful invaders. The immune system provides protection against a variety of potentially damaging substances that can invade the body. These substances include disease-causing organisms, such as bacteria, fungi, parasites, and viruses. The body's ability to resist these invaders is

The Immune System Essay

686 words - 3 pages The immune system is a group of cells, molecules, and tissues that help defend thebody against diseases and other harmful invaders. The immune system provides protectionagainst a variety of potentially damaging substances that can invade the body. Thesesubstances include disease-causing organisms, such as bacteria, fungi, parasites, andviruses. The body's ability to resist these invaders is called immunity. A key feature of theimmune system is

The Immune System

1939 words - 8 pages The human body is an amazing thing. It has survived the test of time over millions of years, countering plague, infections, and all kinds of sickness. This is all because of the bodies immune system which protects the body daily by defending it from antigens. This immune system is one that is directly responsible for keeping your body healthy and maintaining homeostasis. When you come in contact with germs, (meaning harmful bacteria, virus

The Immune System

1311 words - 5 pages One of the most important systems in the body of any species is the immune system. The immune system is a biological response that protects the body from dangerous pathogens that can cause harm or even death to the body. Without a well developed immune system that best fits the species’ body, an animal would have no chance of survival. A successful immune system has a myriad of mechanisms to protect the body from pathogens such as viruses and

The Immune System

1689 words - 7 pages The Immune System The Immune System is a group of cells, molecules, and organs that act together to defend against disease. The body depends on the immune system to seek and destroy bacteria or viruses that could cause harm. There are two types of immunity: innate and adaptive. Innate is the body's first line of a defense against the disease. The innate immunity helped by barriers such as skin, tears, mucus, saliva, and infection. But the

Overview Of The Immune System

1084 words - 4 pages Every day special cells, tissues, proteins and organs which made overall immune system defend against microorganisms, germs and viruses which enter our body. Immune system is system which is able to prevent organism and kill the pathogens. Most of time immune system has dual system in properties and has capacity to identify self and non-self organisms (1). For instance, immune system can be general or specific, natural or adaptive (sometimes

Exploring the Human Immune System

914 words - 4 pages 2.4.1 Overview The immune system can be subdivided into two systems; innate immunity and adaptive immunity. Innate immune system is made up of physical, chemical, and microbiological barriers, as well as the others elements of the immune system such as phagocytic cells (polymorphonuclear neutrophils, monocytes, macrophages), cells that release inflammatory mediator (basophils, mast cell, and eosinophils), natural killer cells, and the

Cancer and the Immune System

1612 words - 6 pages is due to the incredible immune system. Several T cells (white) attacking a tumor However, at times something goes wrong with the immune system. Everyone gets sick once in a while, and beyond making us ill, there are still many diseases which can kill people. Cancer is a disease which manages to defeat the immune system. But how? For years cancer immunologists assumed that the cells of the immune system simply couldn’t recognize tumor cells

Nutrition for a Healthy Immune System

1496 words - 6 pages Nutrition for a Healthy Immune System As technology advances, so does our knowledge of nutrition. So, why with this increase of knowledge we are becoming one of the unhealthiest generations in recorded history? Nutrition and the immune system are integral parts of holistic stress management, and should be thought of as such. The western medical role of treating the problem with medication is not truly curing the underlying problem. One ideal of

Meditation, Well-Being, and Immune System Functioning

3253 words - 13 pages names. The benefits of meditation are subjectively felt but are also backed with scientific proof. An individual may practice meditation sitting, laying down, or even in a yoga pose. Ongoing practice of meditation training enhances the immune system, promotes positive thinking, and improves concentration and focus. The meditation practices researched in this paper are mindfulness, loving-kindness, and prayer. Mindfulness Meditation Having

The Immune System and IgA Deficiency

2044 words - 8 pages THE IMMUNE SYSTEM AND IGA DEFICIENCY - IGA’S FUNCTION IN THE BODY Immunoglobulin A, or IgA, is an antibody which is produced in mucosal linings and plays an important part in mucosal immunity. In the mucosal linings, more IgA is produced than all other types of antibodies combined. The amount of produced IgA contributes greatly to the total immunoglobulin production and around three to five grams of IgA are secreted into the intestinal

Similar Essays

Immune System Essay

685 words - 3 pages The Immune System The immune system are processes and structures within an organism to help protect it from foreign attackers. The immune system consists of cells, tissues, and organs; such as lymphocytes, lymph nodes, phagocytes, and many others. In order for the immune system to function properly it must first learn to discriminate between self-cells and foreign cells. Cells marked “self” need to be left alone. Cells that are foreign should

Immune System Essay

1701 words - 7 pages Have you ever wondered how your body works? Did you ever think about how your body defends itself from outside invaders? Remember the last time you were sick. Did you know how your body fought and killed the sickness? All these questions can be answered by learning about one of the most important systems in your body, the immune system. Right now your immune system is at work. Think about it, millions of cells right now are at work inside

Immune System Essay

1540 words - 7 pages The immune system has many organs that have their own special functions. The organs are the thymus, spleen, lymph nodes, lymph vessels, tonsils and adenoids. There are also bone marrow, lymphocytes, and leukocytes. The thymus is a butterfly shaped organ that lies between the breast plate and the heart. After going through puberty, it doesn’t do as much work as it did in the child stage of life. At birth it is fully developed and grows until

The Immune System Essay

998 words - 4 pages How does structure facilitate function?The layered, expansive structure of the immune system facilitates its function to protect the body. The immune system is a group of cells, molecules, and organs that act together to defend the body against foreign invaders that may cause disease, such as bacteria, viruses, and fungi (Starr 582). The health of the body is dependent on the immune system's ability to recognize and then repel or destroy these