• The immune system plays an important role in keeping us healthy.
• The immune system consists of a network of organs, tissues, and cells.
• The lymphoid organs (red bone marrow, spleen, thymus, lymph nodes, and tonsils) play critical roles in defense mechanisms.

1. Which organs are primary lymphatic organs? Secondary lymphatic organs?
   Answer
2. How do the primary and secondary lymphatoc organs function in immunity?
   Answer

Art Labeling Activity

• The Lymphoid Organs
• Thymus Gland
• Lymph Node
• Spleen
• Bone Marrow

• Immunity consists of nonspecific and specific defenses to protect the body against disease.
• Nonspecific defenses consist of barriers to entry, the inflammatory reaction, natural killer cells, and protective proteins.
• Specific defenses require two types of lymphocytes: B lymphocytes and T lymphocytes.

1. How does nonspecific defense differ from specific defense?
   Answer
2. What are some examples of the body's nonspecific defenses?
   Answer
3. Which blood cells are mainly responsible for specific defense, and how do they function?
   Answer

Essential Study Partner

• Defense Mechanism Overview
• Nonspecific Immunity

Animation Activities

• Phagocytic Cells
• Cytotoxic T-cell Activity Against Target Cells(English)
• Cytotoxic T-cell Activity Against Target Cells(Spanish)
• T Cell Dependent Antigens(English)
• T Cell Dependent Antigens(Spanish)

Essential Study Partner

• Specific Immunity

Animation Activity

• Clonal Selection
• T-cell Function

• Two categories of acquired immunity are active and passive. Active immunity stimulates an immune response while passive immunity does not.

1. What is acquired immunity? What are the different types of acquired immunity, and what are some examples of each?
   Answer

Essential Study Partner

• Overview

Animation Activity

• Vaccination
• Constructing Vaccines(English)
• Constructing Vaccines(Spanish)
• Immune Response

Bioethical Case Studies

• The Quest for an AIDS Vaccine

• While immunity preserves life, it is also responsible for certain undesirable effects, such as allergies, autoimmune diseases, and tissue rejection.
• The lymphatic system works with the other systems of the body to maintain homeostasis.

1. What types of complications and disorders are associated with the functioning of the immune system?
   Answer

Essential Study Partner

• Abnormalities

Art Quiz

• Allergies
• Systems Review Quiz

Animation Activities

• IgE Mediated Hypersensitivity(English)
• IgE Mediated Hypersensitivity(Spanish)