Immune System Chapter 40.

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Presentation transcript:

Immune System Chapter 40

Functions: Defends against pathogens and disease Includes: Skin & mucus membranes White blood cells Lymph nodes and vessels

Nonspecific Defenses First line of nonspecific defense: Skin & Mucus membranes Layers of epithelial tissue that produce mucus Line the digestive system, nasal passages, lungs, respiratory passages, and the reproductive tract Second line of nonspecific defenses: Inflammatory response – histamine (increase blood flow) Temperature response White blood Cells

Immune Response – Specific Defenses Antibody – defensive protein produced upon exposure to a specific antigen – substance that illicits an immune response

Disorders of the Immune System Autoimmune disease – the body launches an immune response against its own cells, attacking body cells as if they were pathogens. Multiple sclerosis (MS) Rheumatoid arthitis Lupus Type I diabetes

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