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Chapter 22: The Immune System – Structure, Function, and Defense Mechanisms

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Introduction to the Immune System

  • Guided course
    Introduction to Immunity
    5:52
  • Guided course
    Antigens & Antibodies
    2:58

Introduction to Innate Immunity

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    Innate Immunity
    2:30
  • Guided course
    Map of the Lesson on Innate Immunity
    6:42

Introduction to First-Line Defenses

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    First-Line Defenses
    1:56
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    Map of the Lesson on First-Line Defenses
    1:37

Physical Barriers in First-Line Defenses: Skin

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    Physical Barriers
    1:28
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    Skin
    4:08

Physical Barriers in First-Line Defenses: Mucous Membrane

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    Physical Barriers in First-Line Defenses: Mucous Membrane
    4:16
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    Mucous Membranes
    2:36

First-Line Defenses: Chemical Barriers

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    Chemical Barriers
    1:09
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    Saliva
    1:36
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    Sweat Glands
    2:04

First-Line Defenses: Normal Microbiota

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    Normal Microbiota
    3:43

Introduction to Cells of the Immune System

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    Map of the Lesson on Cells of the Immune System
    6:08
  • Guided course
    Second-Line Defenses
    3:27
  • Guided course
    Hematopoeisis
    2:33

Cells of the Immune System: Granulocytes

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    Basophils
    3:10
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    Granulocytes
    3:08
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    Eosinophils
    1:56

Cells of the Immune System: Agranulocytes

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    Lymphocytes
    3:12
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    Monocytes
    7:02
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    Aganulocytes
    3:43

Introduction to Cell Communication

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    Map of the Lesson on Cell Communication
    2:59

Introduction to the Complement System

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    Proteins of the Complement System
    4:16
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    Complement System
    4:25
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    Map of the Lesson on the Complement System
    3:25

Activation Pathways of the Complement System

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    Classical Pathway
    3:42
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    Lectin Pathway
    3:04
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    Alternative Pathway
    4:40

Effects of the Complement System

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    Effects of the Complement System
    1:32
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    Inflammatory Response
    4:58
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    Opsonization
    4:09

Review of the Complement System

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    Review of the Complement System
    5:15

Phagocytosis

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    Steps of Phagocytosis
    8:57
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    Phagocytosis
    2:19

Introduction to Inflammation

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    Inflammation
    1:38
  • Guided course
    Chronic Inflammation
    3:09
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    Types of Inflammatory Response
    2:52

Steps of the Inflammatory Response

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    Step 4: Removal of Invading Microbes
    1:26
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    Step 3: Vasodilation
    2:39
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    Step 1: Tissue Damage & Infection
    2:38

Fever

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    Fever
    3:57

Interferon Response

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    Steps of the Interferon Response
    9:59
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    Interferons
    1:32

Introduction to Adaptive Immunity

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    Primary vs. Secondary Lymphoid Organs
    5:08
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    Adaptive Immunity
    5:47
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    Map of the Lesson on Adaptive Immunity
    3:44

Antigens

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    Free Antigens vs. Presented Antigens on APCs
    4:11
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    Antigens
    3:59

Introduction to T Lymphocytes

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    Cell-Mediated Immunity
    3:31
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    Cytotoxic T Cells vs. Helper T Cells
    5:58
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    Naive T Cells Become Effector & Memory T Cells
    7:56

Major Histocompatibility Complex Molecules

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    Major Histocompatibility Complexes
    2:31
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    Classes of MHC Molecules
    7:17

Activation of T Lymphocytes

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    Comic Strip for T-Cell Activation
    3:29
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    T-Cell Activation
    7:33

Functions of T Lymphocytes

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    Functions of Cytotoxic T Cells
    6:21
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    Functions of Helper T Cells: Activation of Macrophages
    5:18
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    Types of Helper T Cells
    3:19

Review of Cytotoxic vs Helper T Cells

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    Comic Strip for Effects of T Cell Functions
    2:58
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    Review of Cytotoxic vs Helper T Cells
    4:27

Introduction to B Lymphocytes

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    Naive B cells Become Effector (Plasma) Cells & Memory Cells
    4:23
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    B Cell Receptors
    4:37
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    Humoral Immunity
    3:55

Antibodies

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    Antibodies
    0:48
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    Antibody Diversity
    2:34
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    Antibody Structure
    5:40

Classes of Antibodies

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    IgA
    2:44
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    Classes of Antibodies
    4:43
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    IgM
    3:34

Outcomes of Antibody Binding to Antigen

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    Outcomes of Antibody Binding to Antigen
    9:16

T Dependent & T Independent Antigens

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    B cell Activation by T Independent Antigens
    3:11
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    B cell Activation by T Dependent Antigens
    5:09
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    T Dependent & T Independent Antigens
    2:08

Clonal Selection

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    Clonal Selection
    6:43

Antibody Class Switching

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    Antibody Class Switching
    7:52

Affinity Maturation

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    Affinity Maturation
    7:27

Primary and Secondary Response of Adaptive Immunity

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    Primary and Secondary Response of Adaptive Immunity
    6:59

Immune Tolerance

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    Immune Tolerance
    3:19
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    Central vs. Peripheral Tolerance
    11:54
  • Guided course
    Football Analogy for Immune Tolerance
    3:21

Regulatory T Cells

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    Regulatory T Cells
    3:53

Natural Killer Cells

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    Natural Killer Cells
    6:53

Review of Adaptive Immunity

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    Review of Adaptive Immunity
    9:20