Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart2h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

21. The Immune System

Introduction to Adaptive Immunity

Anatomy & Physiology

21. The Immune System

Introduction to Adaptive Immunity

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Which of the following are two of the secondary lymphoid organs?

Stem cells & Spleen.

Lymph Nodes & Bone Marrow.

Lungs & Bone Marrow.

Spleen & Lymph Nodes.

Previous problemNext problem

Verified step by step guidance

Understand the role of lymphoid organs in the immune system. Primary lymphoid organs are where lymphocytes are formed and mature, while secondary lymphoid organs are where lymphocytes are activated.

Identify the primary lymphoid organs: Bone marrow and thymus are the primary lymphoid organs where lymphocytes (B cells and T cells) are produced and mature.

Recognize the secondary lymphoid organs: These include the spleen, lymph nodes, tonsils, and mucosa-associated lymphoid tissue (MALT). They are sites where immune responses are initiated.

Evaluate the options given in the problem: Stem cells are not considered a lymphoid organ, and bone marrow is a primary lymphoid organ, not secondary.

Conclude that the spleen and lymph nodes are the correct secondary lymphoid organs from the options provided, as they are involved in filtering blood and lymph, respectively, and initiating immune responses.