BILD2_Lect_1_26_12

BILD2_Lect_1_26_12 - Figure 43.7 Thymus Peyer s...

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Unformatted text preview: Figure 43.7 Thymus Peyer ¡ s patches (small intestine) Appendix (cecum) Adenoid Tonsils Lymphatic vessels Spleen Lymph nodes Lymph node Blood capillary Interstitial fluid Tissue cells Lymphatic vessel Lymphatic vessel Masses of defensive cells Figure 43.2 Pathogens (such as bacteria, fungi, and viruses) INNATE IMMUNITY (all animals) • Rapid response Recognition of traits shared by broad ranges of pathogens, using a small set of receptors • Recognition of traits specific to particular pathogens, using a vast array of receptors • • Slower response Barrier defenses: Skin Mucous membranes Secretions Internal defenses: Phagocytic cells Natural killer cells Antimicrobial proteins Inflammatory response Humoral response: Antibodies defend against infection in body fluids. Cell-mediated response: Cytotoxic cells defend against infection in body cells. ADAPTIVE IMMUNITY (vertebrates only) Figure 43.3 Pathogen PHAGOCYTIC CELL Vacuole Lysosome containing enzymes Figure 43.6 EXTRACELLULAR FLUID PHAGOCYTIC CELL VESICLE Lipopolysaccharide Helper protein TLR4 Flagellin TLR5 CpG DNA ds RNA TLR9 TLR3 Innate immune responses Figure 43.8-3 Figure 43....
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BILD2_Lect_1_26_12 - Figure 43.7 Thymus Peyer s...

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