Immune system

In Glogpedia

by HarrisonHunt4thhour
Last updated 5 years ago

Discipline:
Science
Subject:
Human Anatomy
Grade:
10

Toggle fullscreen Print glog
Immune system

The Immune System

Allergies are disorders of the immune system. Most allergic reactions are a result of an immune system that responds to a "false alarm." When a harmless substance such as dust, mold, or pollen is encountered by a person who is allergic to that substance, the immune system may react dramatically by producing antibodies that "attack" the allergen

The immune system is made up of a network of cells, tissues, and organs that work together to protect the body. The cells involved are white blood cells, or leukocytes, which come in two basic types that combine to seek out and destroy disease-causing organisms or substances.

White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All leukocytes are produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell. Leukocytes are found throughout the body, including the blood and lymphatic system

B cells and T cells are the main types of lymphocytes. B cells work chiefly by secreting substances called antibodies the body’s fluids. Antibodies ambush foreign antigens circulating in the bloodstream. They are powerless, however, to penetrate cells. The job of attacking target cells—either cells that have been infected by viruses or cells that have been distorted by cancer—is left to T cells or other immune cells.

Immune system disorders cause abnormally low activity or over activity of the immune system. In cases of immune system over activity, the body attacks and damages its own tissues (autoimmune diseases). Immune deficiency diseases decrease the body's ability to fight invaders, causing vulnerability to infections

Skin provides protection from foreign invaders in several ways. Apart from the physical barrier, there are specialised cells of the immune system throughout the layers of the skin.


Comments

    There are no comments for this Glog.