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Questions and Answers
The lymph nodes' outer layer contains which of the following?
The lymph nodes' outer layer contains which of the following?
The thymus is located in the pharyngeal region.
The thymus is located in the pharyngeal region.
False
The spleen filters blood, not lymph.
The spleen filters blood, not lymph.
True
Which of the following is a characteristic of the cytoreticulum in the thymus?
Which of the following is a characteristic of the cytoreticulum in the thymus?
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Where are Hassall's corpuscles located?
Where are Hassall's corpuscles located?
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What differentiates primary nodules from secondary nodules?
What differentiates primary nodules from secondary nodules?
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Lymphatic follicles are only found in the cortex of lymph nodes.
Lymphatic follicles are only found in the cortex of lymph nodes.
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What is the primary function of MALT?
What is the primary function of MALT?
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What is the difference between primary lymphoid organs and secondary lymphoid organs?
What is the difference between primary lymphoid organs and secondary lymphoid organs?
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What is the function of desmosomes in the thymic epithelial cells?
What is the function of desmosomes in the thymic epithelial cells?
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Why are tonsils strategically located in the pharyngeal region?
Why are tonsils strategically located in the pharyngeal region?
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Bursa of Fabricius is found in mammals.
Bursa of Fabricius is found in mammals.
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Which of the following is NOT a function of the spleen?
Which of the following is NOT a function of the spleen?
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What is the role of the medullary cords in lymph nodes?
What is the role of the medullary cords in lymph nodes?
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Small inactive lymphocyte accumulation found in clusters of lymphocytes with no germinal center is known as Primary Nodules.
Small inactive lymphocyte accumulation found in clusters of lymphocytes with no germinal center is known as Primary Nodules.
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Which of the following structures is NOT a primary lymphoid organ?
Which of the following structures is NOT a primary lymphoid organ?
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The thymus is a primary lymphoid organ, where lymphocytes mature in a cortex and medulla region.
The thymus is a primary lymphoid organ, where lymphocytes mature in a cortex and medulla region.
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What is the name given to the unique structures made of concentric layers of epithelial cells that support T-cell development found in the medulla of the thymus?
What is the name given to the unique structures made of concentric layers of epithelial cells that support T-cell development found in the medulla of the thymus?
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The capsule of the thymus is a connective tissue surrounding it.
The capsule of the thymus is a connective tissue surrounding it.
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The lymphoid tissue found in the cortex is considered as a "nodular" tissue.
The lymphoid tissue found in the cortex is considered as a "nodular" tissue.
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Lymph nodes are located in the pharyngeal region.
Lymph nodes are located in the pharyngeal region.
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The spleen has two regions, the white pulp and the red pulp.
The spleen has two regions, the white pulp and the red pulp.
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What is the name given to the tissue located in the spleen which is made up of lymphocytes and is responsible for immune responses to blood-borne antigens?
What is the name given to the tissue located in the spleen which is made up of lymphocytes and is responsible for immune responses to blood-borne antigens?
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MALT (Mucosa-Associated Lymphoid Tissue) is known to have a connective tissue capsule.
MALT (Mucosa-Associated Lymphoid Tissue) is known to have a connective tissue capsule.
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Which of the following is NOT a way that MALT protects the body from infection?
Which of the following is NOT a way that MALT protects the body from infection?
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Study Notes
Lymphoid Organs: Histology - Class Mind Map
- Lymphoid Organs: Classified as primary (producing/maturing lymphocytes) and secondary (encountering antigens, initiating responses).
- Primary Lymphoid Organs: Bone Marrow (hematopoiesis, B-cell maturation, T-cell production), Thymus (T-cell maturation, cortex/medulla structure, Hassall's corpuscles, cytoreticulum formed by thymic epithelial cells joined by desmosomes).
- Secondary Lymphoid Organs: Lymph nodes (capsule, cortex - follicles, medulla - cords/sinuses, B and T-cell activation), Tonsils (pharyngeal region, immune response to inhaled/ingested materials, lymphatic follicles in epithelial covering), Spleen (blood filtration, white pulp - lymphocytes, red pulp - old RBC removal, splenic cords and sinusoids), MALT (mucosal surfaces, immune responses).
- Nodular/Follicular Lymphoid Tissue: Found in various organs, lacks reticular tissue, instead uses cytoreticulum (cytoskeletal structure by thymic epithelial cells), connected by desmosomes.
- Lymphocytes: Small, inactive lymphocyte accumulations. A cluster of lymphocytes without a germinal center signifies inactivity (no antigen exposure). Primary nodules lack germinal centers until exposed to antigens to form secondary nodules.
- Germinal Centers: Sites of B-cell proliferation, differentiation, and antibody production (somatic hypermutation).
- Bursa of Fabricius: Mentioned as a lymphoid structure in birds.
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Description
Explore the histology of lymphoid organs through this comprehensive mind map. Learn about the classification, structures, and functions of primary and secondary lymphoid organs such as the bone marrow, thymus, lymph nodes, tonsils, and spleen. This quiz will enhance your understanding of immune responses and lymphocyte development.
