microscopic structure of lymph node, spleen, thymus and tonsil dr. sama ul haque
TRANSCRIPT
![Page 1: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/1.jpg)
Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil
Dr. Sama ul Haque
![Page 2: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/2.jpg)
Objectives• Understand the location of lymphatic organs.
• Discuss the microscopic features of Lymph Node.
• Discuss the microscopic features of Spleen.
• Discuss the microscopic features of Thymus.
• Discuss the microscopic features of Tonsil.
![Page 3: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/3.jpg)
Location of
Lymphatic Organs
![Page 4: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/4.jpg)
Lymph Node
![Page 5: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/5.jpg)
Lymph Node
• Covered by a capsule which extends to form Trabeculae.
• Divided into outer cortex and inner medulla.
• OUTER CORTEX contains:
Lymphatic nodules with germinal center
• INNER MEDULA contains:
Medullary Cords and Medullary Sinus
![Page 6: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/6.jpg)
Lymph node
SC --- Subcapsular SinusC --- CortexM --- MedullaH --- HilumLN --- Lymphatic NodulesT --- TrabeculaeMS --- Medullary SinusMC --- Medullary Cords
LN
CapsuleSC
C
M
H
T
MC
MS
![Page 7: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/7.jpg)
Lymph node
CT --- Connective tissueC --- CortexM --- MedullaP --- ParacortexLN --- Lymph NodeT ---TrabeculaeMS --- Medullary SinusMC --- Medullary Cords
![Page 8: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/8.jpg)
Lymph node
C -- Capsule, S -- Subcapsular Sinus, N -- Lymph Node
![Page 9: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/9.jpg)
Lymph node
![Page 10: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/10.jpg)
Lymph node
![Page 11: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/11.jpg)
Flow of Lymph
![Page 12: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/12.jpg)
Spleen
![Page 13: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/13.jpg)
Spleen
• Covered by a capsule which extends to form Trabeculae.
• Trabeculae contains trabecular arteries & Veins.
• Lymphatic nodules with germinal centers constitutes the white Pulp.
• Central artery passes through lymphatic nodules.
• Red or Splenic pulp contains pulp arteries, Venous sinuses and Splenic cords (Cords of Billroth).
![Page 14: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/14.jpg)
Spleen
![Page 15: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/15.jpg)
Spleen
![Page 16: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/16.jpg)
Splenic Cords and Splenic Sinusoids
![Page 17: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/17.jpg)
Open and Closed Circulation in Spleen
![Page 18: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/18.jpg)
Thymus
![Page 19: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/19.jpg)
Thymus
• Covered by a capsule which extends to form Trabeculae.
• Trabeculae extends inwards to forms numerous incomplete lobules (lobulated appearance).
• Each lobule consists of dark staining outer cortex and a light staining inner medulla.
![Page 20: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/20.jpg)
Thymus• Cortex contains densely packed lymphocytes (No
lymphatic nodules).
• Medulla contains fewer lymphocytes but more epithelial reticular cells.
• Medulla also contains Thymic (Hassall’s) Corpuscles.
• Thymic (Hassall’s) Corpuscles are oval structures consisting of round whorls of flattened epithelial cells.
![Page 21: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/21.jpg)
Thymus
![Page 22: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/22.jpg)
Thymus
![Page 23: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/23.jpg)
Palatine Tonsil
![Page 24: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/24.jpg)
Palatine Tonsil• Surface of the Tonsil is covered by Stratified
Squamous nonkeratinized epithelium.
• Tonsil is invaginated by deep grooves called Tonsillar Crypts.
• Below epithelium lymphatic nodules are present in the connective tissue.
• Dense connective tissue underlies the palatine tonsil and forms capsule.
![Page 25: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/25.jpg)
Palatine Tonsil
![Page 26: Microscopic Structure of Lymph node, Spleen, Thymus and Tonsil Dr. Sama ul Haque](https://reader030.vdocuments.us/reader030/viewer/2022033019/56649f145503460f94c284c0/html5/thumbnails/26.jpg)
Thank You