LESSON 17 multiple Lymphoid Organs: Lymph Nodes

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What is the main function of lymph nodes in the lymphatic system?

To synthesize type III collagen

To produce lymphatic vessels

To phagocytose foreign substances

To filter lymph and facilitate the response of lymphocytes to antigens (correct)

What is the composition of the stroma in a lymph node?

Only reticular fibres and reticular cells

Reticular fibres, reticular cells, capsule, and trabeculae (correct)

Capsule and trabeculae

Connective tissue and parenchyma

What structures separate the parenchyma from the capsule and trabeculae in a lymph node?

Lymphatic sinuses (correct)

Type III collagen

Medullary macrophages

Reticular fibres

What is the shape of lymph nodes?

Ovoid or kidney-shaped Signup and view all the answers

What type of vessels enter the lymph node through the capsule at various intervals on its convex surface?

Afferent lymphatic vessels Signup and view all the answers

What do the afferent lymphatic vessels flow into upon entering the lymph node?

Subcapsular sinus Signup and view all the answers

What prevents the lymph from going back in the afferent and efferent lymphatic vessels?

Valves Signup and view all the answers

What is the supportive framework of the lymphatic sinuses made up of?

Reticular cells and fibres Signup and view all the answers

Where are high endothelial venules (HEV) located within the lymph node?

Cortical parenchyma Signup and view all the answers

What do high endothelial venules (HEV) lack?

Muscular layer Signup and view all the answers

Which vessels are the port of entry into the lymph node for lymphocytes carried by the blood?

Capillaries Signup and view all the answers

What is the structure of the pig lymph nodes like compared to other species?

They have several nodular units with central medullary tissue and wide medullary sinuses. Signup and view all the answers

What kind of cells are observed in the lumen of the medullary sinuses?

T cells, B cells, and macrophages Signup and view all the answers

What is located in the outer region of the cortex of a lymph node?

Lymphoid follicles and interfollicular areas Signup and view all the answers

What elements facilitate the interaction between antigens with macrophages and dendritic cells?

Macrophages and dendritic cells Signup and view all the answers

What do the lymphatic sinuses allow filtering into the parenchyma?

Substances in solution, particles in suspension, and cells Signup and view all the answers

What is the specific function of the lymph nodes' microenvironment?

Filtering antigens from lymph Signup and view all the answers

What is the composition of the lymph node stroma primarily made up of?

Type III collagen and reticular cells Signup and view all the answers

What separates the parenchyma from the capsule and trabeculae in a lymph node?

Lymphatic sinuses Signup and view all the answers

What is the shape of the lymph nodes?

Oval or kidney-shaped Signup and view all the answers

What is the shape of the lymphatic sinuses in the medulla of a lymph node?

Irregular Signup and view all the answers

Where do the medullary sinuses drain the efferent lymphatic vessels in pig lymph nodes?

Spaces between the nodular units Signup and view all the answers

What is the composition of the cords in the medulla of a lymph node?

T cells, B cells, plasma cells, and macrophages Signup and view all the answers

What is the structure of the medullary tissue distribution in pig lymph nodes?

Around the periphery of the nodular units and around the efferent hilum Signup and view all the answers

Where are high endothelial venules (HEV) located within the lymph node?

In the interfollicular area and paracortex Signup and view all the answers

What is the main function of high endothelial venules (HEV) in a lymph node?

To allow entry of lymphocytes carried by the blood Signup and view all the answers

What prevents backflow of lymph in both afferent and efferent lymphatic vessels?

Valves Signup and view all the answers

What do dendritic cells and macrophages located in the wall of medullary sinuses facilitate?

Interaction between antigens and immune cells Signup and view all the answers

What is located in the outer region of the cortex of a lymph node?

Lymphoid follicles and interfollicular areas Signup and view all the answers

What type of vessels carry lymphocytes into the parenchyma of a lymph node from primary lymphoid organs or blood recirculation?

Postcapillary venules Signup and view all the answers

What is the supportive framework of the lymphatic sinuses made up of?

Reticular cells and fibres Signup and view all the answers

LESSON 17 multiple Lymphoid Organs: Lymph Nodes

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Questions and Answers

What is the main function of lymph nodes in the lymphatic system?

What is the composition of the stroma in a lymph node?

What structures separate the parenchyma from the capsule and trabeculae in a lymph node?

What is the shape of lymph nodes?

What type of vessels enter the lymph node through the capsule at various intervals on its convex surface?

What do the afferent lymphatic vessels flow into upon entering the lymph node?

What prevents the lymph from going back in the afferent and efferent lymphatic vessels?

What is the supportive framework of the lymphatic sinuses made up of?

Where are high endothelial venules (HEV) located within the lymph node?

What do high endothelial venules (HEV) lack?

Which vessels are the port of entry into the lymph node for lymphocytes carried by the blood?

What is the structure of the pig lymph nodes like compared to other species?

What kind of cells are observed in the lumen of the medullary sinuses?

What is located in the outer region of the cortex of a lymph node?

What elements facilitate the interaction between antigens with macrophages and dendritic cells?

What do the lymphatic sinuses allow filtering into the parenchyma?

What is the specific function of the lymph nodes' microenvironment?

What is the composition of the lymph node stroma primarily made up of?

What separates the parenchyma from the capsule and trabeculae in a lymph node?

What is the shape of the lymph nodes?

What is the shape of the lymphatic sinuses in the medulla of a lymph node?

Where do the medullary sinuses drain the efferent lymphatic vessels in pig lymph nodes?

What is the composition of the cords in the medulla of a lymph node?

What is the structure of the medullary tissue distribution in pig lymph nodes?

Where are high endothelial venules (HEV) located within the lymph node?

What is the main function of high endothelial venules (HEV) in a lymph node?

What prevents backflow of lymph in both afferent and efferent lymphatic vessels?

What do dendritic cells and macrophages located in the wall of medullary sinuses facilitate?

What is located in the outer region of the cortex of a lymph node?

What type of vessels carry lymphocytes into the parenchyma of a lymph node from primary lymphoid organs or blood recirculation?

What is the supportive framework of the lymphatic sinuses made up of?

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