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Lung Capacity

Notes: Immune System

IntroIntro Immune system- how your body defends against harmful viruses, bacteria, & fungi (pathogens) Features multiple layers of defense

IntroIntro Allergies are exaggerated responses to foreign bodies Immune system complicates organ transplantation

Types of Defenses Non-specific defenses- guards against all pathogens indiscriminately; examples: – skin acts as physical barrier

Types of Defenses Non-specific defenses- guards against all pathogens indiscriminately; examples: – skin acts as physical barrier – mucous membranes trap pathogens Staphylococcus auerus (yellow) sticking to mucous (blue) on cilia cells

Types of Defenses Non-specific defenses- guards against all pathogens indiscriminately; examples: – skin acts as physical barrier – mucous membranes trap pathogens – acidic environment of stomach is hostile

Types of Defenses Non-specific defenses- guards against all pathogens indiscriminately; examples: – skin acts as physical barrier – mucous membranes trap pathogens – acidic environment of stomach is hostile – fever speeds up body responses – white blood cells – inflammatory response – and more

Inflammatory Response

Types of Defenses Specific defenses- targets certain pathogens – white blood cells mark particular pathogens for destruction & engulf them

Antigens & Antibodies Antibodies- body’s proteins that bind to microbes, marking them for destruction Antigens- a foreign molecule that triggers an immune response – Ex: proteins, polysaccharides, toxins

Antigens & Antibodies

p. 969 A.Q. 1a, 2ab, 3ab, 4a