Lymphatic System
Vessels, Organs and Tissues
Lymphatic System
Vessels: Connect to CV Lymphatics
Capillaries Collecting vessels Trunks
Transport fluid => lymph Organs: house immune cells
LN Spleen Thymus
Tissues Tonsils GALT MALT
Fluid Compartments
Capillary Dynamics Hydrostatic/Hydraulic Osmotic
Fluid Compartments ICF ECF
ISCF Plasma Lymph
Lymphatic Capillary
Lymphatic Vessels and Ducts
Problem Lymph Return : Lymphedema
Lymphatic Vessel Circuits
Lymph Node: Location
Lymph Node: Gross Anatomy
1. Afferent Lymphatics 2. Cortex 3. Germinal Center 4. Capsule 5. Medullary cord 6. Valve 7. Efferent Lymphatics
LN Structure: CT and vessels
Capsule Subcapsular sinus Trabecula Reticular CT stroma Vessels
Types Afferent Efferent
Valves
Lymph Node: Histology
B cellsT cellsMO
Lymph Node: Capsule Region
Lymph Node: Cortex
Lymphatic NoduleGerminal Center
Lymph Node: Medulla
Lymph Node: Medullary Cords
Medullary CordsSinusoids
Macrophages
L.N. Medullary Cells
P = Plasma cells (daughter cells of Activated B cells M = Macrophages (mature monocytes in tissues)
LN Histology Summary
Diagnostics for Lymphatics and LN
Lymphangiogram
Lymphatic Problem: Lymphoma
Lymphatic Nodule: Basic structure for All Lymphatic tissue
Spleen: Gross Anatomy
Spleen: Histology
SplenicSinusoid
Spleen Problems
Rupture Cancer Infection
Hydatid cyst
Thymus Embryological Development 1. Mandibular arch
2. Hyoid arch 3. Cervical sinus entry 4. 3rd pharyngeal pouch 5. 4th pharyngeal pouch 6. Foramen cecum 7. Thyroid 8. Cervical sinus 9. Thymus (3rd pouch) 10. Thymus (4th pouch)
Thymic Cell Development 1. Thymic capsule 2. Thymic nurse cells 3. CT septa and BV 4. Subcapsular epithelium
(for the blood thymus barrier) 5. Cortical Epithelial cells 6. Medullary epithelial cells 7. Dendritic cells 8. Hassall’s Corpuscle 9. Macrophages 10. Cortex 11. Medulla
Thymic Organization
Thymic Capsule, Septa and Lobules
Thymic Age Degeneration
Thymic Problem
Thymic Aplasia
Tonsil: Location
Pharyngeal [Adenoids] Palantine Lingual Tubal
Tonsil: Epithelial Histology
Tonsil Lymphatic Nodules
Tonsil Problem: Tonsillitis
Gut Associated Lymphatic Tissue (GALT) Location
Ileum Problems
Inflammation Necrosis
Appendix Problems
Appendicitis
Appendix rupture and necrosis
MALT
bronchusepiglottis