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1. Lymph fluid is composed of: water
proteins- 1/2 of the protein circulating in the systemic system
cells- rbc, wbc, lymphocytes
waste products, cancer cells, cell debris, and bacteria
fat and fat-soluble vitamins
2. Types of lymph vessels: capillaries
pre-collectors
collectors
trunks and ducts
3. Lymph capillaries: main purpose is absorption of the lymphatic load into the lymph system
-are larger and more permeable than blood capillaries, are able to absorb macro-molecules
4. what is responsible for opening and closing the endothelial junction of lymph
capillaries: Anchoring filaments- semi-elastic fibers
-allow for lymph capillaries to stay open during high pressure to allow for passive influx
-close when pressure inside excess interstitial pressure - ensures that return of protein, water, other macromolecules
back to the cardiovascular system
-do not have valves
5. Lymph pre-collectors: connection between the lymph capillaries and the connectors
-contains smooth muscle and valves
6. Lymph collectors: transport lymph fluid to the lymph nodes and the lymphatic trunks
-superficial (subcutaneous fat and skin) and deep collectors (muscle, joint, ligaments)
-passive fluid movement based upon the pressure gradient due to the one-way bicuspid valves that keep flow moving
from distal to proximal
7. lymphangion: segment between the valves of a lymph collector
-activity is regulated by sympathetics and lymph volume
-lymphangioactivity- intrinsic contraction
8. lymph nodes: filtration system- reabsorption of lymph fluid that will be returned to the venous system
- can vary in shape and size
-primary identification site for immune system macrophages and lymphocytes
9. how many lymph nodes throughout the body: 600-800
-most are in the abdomen, head, and neck
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10. lymph trunks: largest transporter of lymph fluid to the organs and extremities
-comes here after being filtered by the nodes
11. Lymph trunks of the lower body: R and L lumbar runks
intestinal trunks
12. Lymph trunks of the upper body: R and L jugular
R and L subclavian
R and L broncho-mediastinal
13. lymph ducts: responsible for transporting lymph back into the blood stream
-thoracic duct (largest)
-right lymphatic duct
14. thoracic duct: drains 3/4 of the total daily lymph fluid to the venous angle
-includes fluid from cisterna chyli
-most of the body
-drains into left subclavian vein
15. right lymphatic duct: drains 1/4 of the total daily lymph fluid
-right UE, right side of head
-drains into right subclavian vein
16. overall flow of lymph: lymph capillaries
pre-collectors
lymph nodes
trunks
ducts at venous angle
heart
17. function of the lymphatic system: returns protein and water from the interstitial to the CV system
-absorbs proteins, fat, and fat-soluble vitamins through vessels in the digestive system
-recognizes and responds to foreign cells, microbes, and cancer cells as part of the immune system
18. transport capacity: maximum amount of lymph fluid that can be transported in the lymphatic system over
a period of time
19. lymphatic load: amount of lymph fluid that is needed to be transported
20. functional reserve: the difference between the transport capacity and the lymphatic load
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