Histology Of Lymph Nodes

Histology Of Lymph Nodes

Question 1. Histology of Lymph Node
Answer:

• They are small beanshaped structures scattered along the lymphatic vessels
• Lymph node is surrounded by capsule composed mainly of collagen fibres
• Lymph node consists of

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• • Connective tissue framework
  • Cells
    1. L-ymphocytes
       • B-Lymphocytes
       • T-Lymphocytes
    2. Macrophages
    3. Fibroblasts
    4. Endothelial cells
    5. Pericytes & smooth muscle cells

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Histology of lymph node Zones:

1. 1. Cortex-Outermost zone
   2. Medulla-Surrounding cortex

Question 2. Histology of Thymus
Answer:

• Thymus consists of right & left lobes joined by fibrous tissue
• Each lobe is about 2 mm in diameter
• It has outer cortex & inner medulla
• Each lobe has
  1. Capsule
  2. Septa

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Histology of thymus Cells of thymus:

1. Epithelial cells called epitheliocytes
2. Lymphocytes
3. Macrophages
4. Corpuscles of Hassall