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- A secondary circulatory system that is one way with dead ending vessels
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- Collect tissue fluid and return it to the blood vessels
- Defends the body against infection
- Absorb and transfer fats in the digestive system
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- Fluid that seeps out of blood while it moves from arteries to capillaries to veins
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- Because of the pressure of the blood moving into and out of capillaries
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- Extracellular fluid (ECF)
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- Tissue fluid does not contain red blood cells (RBC) or platelets
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- Red blood cells and platelets are too large to escape the capillaries
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- 90% of tissue fluid returns naturally
- 10% of the fluid enters lymph vessels which returns the fluid to the capillaries
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- Lymph
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- Yellow
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- Because it is made up of mostly fats, protein and white blood cells (WBC)
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- Transports glycerol's and fatty acids to the lymph vessel
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- One
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- Lymph vessels contain valves
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- Fight infection
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- Filter bacteria
OR
- White blood cells mature in lymph nodes
- These white blood cells then engulf and destroy microorganisms
Or
- White blood cells produce antibodies to fight infection