Immune System

Ashleigh Melinda Hester

What is the Immune System? For and Important

The immune system is a network of cells, tissues, and organs that work together to defend the body against attacks by “foreign” invaders. The immune System is important Because the immune system fights of foreign bacteria.

Immune System Diseases

Autoimmune diseases :Autoimmune diseases arise from the bad immune response of the body against substances and tissues normally present in the body.

Immunodeficiency : Immunodeficiency is a place in which Immune System is to fight the infectious diseases.

Asthma : Asthma is a long time condition that can cause cough and breathlessness .


  • Getting under 5 hours of sleep a night has been shown to greatly depress immune function in your body.
  • In your blood, there are around 50 billion white cells whose only interest is to keep your body's natural defences in good condition, so don't worry if you lose 5 billion when you give blood - you still have a few left.
  • When your catecholamine and CD8 levels change, these levels can suppress the immune system.
  • Dieting decreases natural killer cell functionality, therefore weaking the immune system.

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What organs make up your Immune System?

There are four main organs that make up your immune system: Bone marrow, Thymus, Spleen, and Lymph Nodes.