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Lecture 18

BIOL 2P98 Lecture Notes - Lecture 18: Lymphatic Vessel, Extracellular Fluid, Thymosin


Department
Biological Sciences
Course Code
BIOL 2P98
Professor
drfu
Lecture
18

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Lymphac system
Main points
- Helps to regulate ssue uid volume
- Part of immune system
- Structured to encounter Ags and pathogens
Funcons of lymphoid ssue
- Lymphocytopoiesis
- Parcipaon in immune reacons
- Phagocyc acvity
- Fluid volume balance
- Transport
Structures of lymphoid ssue
Nodules
- Direct exposure: to Angen( Ags) in ssue uids in which they reside
- Nodes: lymphocytes exposed to lymph
- Spleen: immune competent cells exposed to
- Thymus: T-lymphocyte di'erenaon/maturaon (Thymosins)
Lymphoid Tissue
Stroma Free cells
Fibers
- Recular
- Collagen
Mostly Lymphoytes
Cells
- Reccular
Thymus
Lymph nodes
Spleen
Free macrophages
Plasma cells
Fixed macrophage granulocytes
,broblast Angen
Presenng cells (APCS)
Lymphac vessels and valves (Fig 23.3)
Lymphac ducts and drainage (23.4)
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