Lymphatic Vessels

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1

Lymphatic Vessels

carry lymph

2

Lymph

fluid lost by the blood into surrounding tissue; interstitial fluid being returned to circulation

3

Lymphatic Cells

phagocytic cells and lymphocytes

4

Lymphatic Functions

1. Fluid recovery
Reabsorb excess fluid to circulation
2. Immunity
Lymph nodes = filters
3. Lipid absorption
Lacteals = transport lipids in digestive tract

5

Lymphatic Capillaries Characteristics (6)

1. Penetrate most tissues
2. Originate as blind pockets
3. Large diameters
4. Thin walls
5. Basement membrane not continuous
6. Endothelial cells overlap to form opening valves

6

Lymphatic Capillaries Structure (3)

1. One way valves created by overlapping cells
2. Anchoring to neighboring tissues for swelling to "open" valves
Collecting vessels (similar veins, more
valves & anastamoses)
3. Permits entry of protein, bacteria, cell debris

7

Anastamosis

connection of normally separate parts or spaces so they intercommunicate

8

Lymphatic Vessels Structure Order (5)

1. IS fluid
2. Lymph capillaries
3. Lymph collecting vessels
4. Lymph trunks
5. Lymph ducts (upper left region=drainage)

9

Lymphatic Vessels (3)

1. Similar to Veins (embryologically derived)
2. Contain valves (prevent back flow)
3. Interspersed between veins & arteries

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Lymphatic Vessels names (3)

Right lymphatic duct
Brachiocephalic vein
Thoracic duct

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Lymphatic Immunity

Lymph nodes = filters

12

Lymphatic Lipid

Lacteals = transport lipid in digestive tract