Chapter 21 The Lymphatic System

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Functions of Lymphatic System • fluid recovery – fluid continually filters from the blood capillaries into the tissue spaces • blood capillaries reabsorb 85% • 15% (2 – 4 L/day) of the water and about half of the plasma proteins enters lymphatic system and then returned to the blood • immunity – excess filtered fluid picks up foreign cells and chemicals from the tissues • passes through lymph nodes where immune cells stand guard against foreign matter • activate a protective immune response • lipid absorption – lacteals in small intestine absorb dietary lipids that are not absorbed by the blood capillaries 21-4
Components of the Lymphatic System • lymph – the recovered fluid • lymphatic vessels – transport the lymph • lymphatic tissues – composed of aggregates of lymphocytes and macrophages that populate many organs in the body • lymphatic organs – defense cells are especially concentrated in these organs – separated from surrounding organs by connective tissue capsules 21-5
Page 1 and 2: Chapter 21 Lecture Outline Copyrigh
Page 3: Lymphatic and Immune Systems (a) Co
Page 7 and 8: Lymphatic Capillary Copyright © Th
Page 9 and 10: (a) Valve in a Lymphatic Vessel Val
Page 11 and 12: Lymphatic system Lymphatic capillar
Page 13 and 14: Right jugular trunk Right lymphatic
Page 15 and 16: Lymphatic Cells • natural killer
Page 17 and 18: Macrophages Copyright © The McGraw
Page 19 and 20: Lymphatic Nodule Copyright © The M
Page 21 and 22: Red Bone Marrow • red bone marrow
Page 23 and 24: Thymus • thymus - member of the e
Page 25 and 26: Trabecula Lobule (b) Histology of T
Page 27 and 28: Stroma: Capsule Reticular tissue Tr
Page 29 and 30: Lymph Node Locations • abdominal
Page 31 and 32: Lymphadenopathy • lymphadenopathy
Page 33 and 34: Tonsils • tonsils - patches of ly
Page 35 and 36: Figure 21.13 a (a) The Tonsils Copy
Page 37 and 38: Copyright © The McGraw-Hill Compan
Page 39 and 40: Nonspecific Resistance and Immunity
Page 41 and 42: Leukocytes and Macrophages • phag
Page 43 and 44: Eosinophils • found especially in
Page 45 and 46: Lymphocytes • three basic categor
Page 47 and 48: Antimicrobial Proteins • proteins
Page 49 and 50: Complement System • complement sy
Page 51 and 52: Complement System • mechanisms of
Page 53 and 54: Membrane Attack Complex Copyright
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Membrane Attack Complex • complem
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Enemy cell Action of NK cell Copyri
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Temperature (°C) 39 38 37 2 Hypoth
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Inflammation • inflammation - loc
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Processes of Inflammation • three
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Mobilization of Defenses - selectin
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Containment and Destruction of Path
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Tissue Cleanup • monocytes the pr
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Specific Immunity • immune system
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Passive and Active Immunity • nat
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Lymphocytes • major cells of the
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Life Cycle of T cells - negative se
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Antigen-Presenting Cells (APCs) •
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Figure 21.21a Antigen Processing (a
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Cellular Immunity • cellular immu
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T Cell Recognition • recognition
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Figure 21.22 T cell Activation Copy
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Attack : Role of Helper T (T H) Cel
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Cytotoxic T Cell Function Cancer ce
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Memory • immune memory follows pr
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Humoral Immunity • recognition -
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Humoral Immunity - Recognition Figu
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Antibodies • immunoglobulin (Ig)
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Five Classes of Antibodies • name
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Humoral Immunity - Attack • neutr
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Humoral Immunity - Memory • prima
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Humoral Immunity Responses Serum an
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Hypersensitivity • hypersensitivi
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Type I (acute) Hypersensitivity •
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Type I (acute) Hypersensitivity •
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Type III Hypersensitivity (Immune C
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Autoimmune Diseases • autoimmune
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Immunodeficiency Diseases • Acqui
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AIDS • by destroying TH cells, HI
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HIV Transmission • through blood,
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Chapter 21 The Lymphatic System

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