Lymphatic System Flashcards
Return interstitial fluid and leaked plasma proteins to the heart that leaks out of the vessels
Lymphatic system vessels
What are the three parts to the lymphatic system
Lymphatic vessels
Lymph
Lymph nodes
Blind ended tubes in which unchastened endothelial cells overlap each other forming flap like mini valves
What opens the minivalves
Lymphatic capillaries
Increased ECF
What is the flow of lymphatic vessels
Successively larger and thicker walled channels
1st collecting vessels
2nd trunks
3rd ducts
The collecting vessels have 1 walls and more 2 and they 3 more
- Thinner
- Internal valves
- Anastomose
Formed by the union of lymphatic collecting vessels
Lymphatic trunks
Lymph from trunks delivered into one of two ducts and empties into venous circulation
Lymphatic ducts
What are two basic functions of lymph nodes
Filter lymph
Immune system activation
Contain follicles 1.
In follicles contain dividing B cells 2.
Deep cortex houses 3.
- Cortex
- Germinal centers
- T cells
Contains both B and T cells
Medullary cords
Site of lymphocyte proliferation and immune surveillance and response
Cleanses blood of aged cells and platelets
Spleen
Structure of spleen and functions
- White pulp- mostly lymphocytes on reticular fibers
2. Red pulp- rich in RBC
MALT mucosa associated lymphoid tissue
Tonsils
Peyers patches
Appendix