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Chapter 22
Lymphatic System and Immunity
10
Anatomy
Undergraduate 2
04/05/2011

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Term
Immunity or Resistance
Definition
Ability to ward off damage or disease through our defenses
Term
2 Types of Immunity
Definition
-Innate or nonspecific immunity
-Adaptive or specific immunity
Term
Innate or nonspecific immunity
Definition
-Present @ birth
-1st and 2nd lines of defense
-No specific recognition of invaders
-No memory
Term
Adaptive or specific immunity
Definition
-specific recognition of invaders
-coupled with memory
Term
Lymphatic System
Definition
-lymph
-lymphatic vessels
-structures and organs containing lymphatic tissue
-red bone marrow
Term
Functions of the Lymphatic System
Definition
-drain excess interstitial fluid
-transport dietary lipid
-carry out immune responses
Term
Lymphatic vessels and lymph circulation
Definition
-Vessels begin as lymphatic capillaries
+Closed at one end
-Unite to form large lymphatic vessels
+resemble veins in structure
>thinner walls
>More valves
-Passes through lymph nodes
+encapsulated organs with masses of B and T cells
Term
Lymphatic capillaries
Definition
-Slightly larger diameter than blood capillaries
-Unique one way structure
-Permits interstitial fluid to flow in but not out
-Anchoring filaments pull openings wider when interstitial fluid accumulates
-Small intestine has lacteal for dietary lipid intake
+Chyle is lymph with lipids
Term
Lymph trunks and ducts
Definition
-Vessels unite to form lymph trunks
-5 Principal trunks
-passes from lymph trunks into 2 main channels
+thoracic and right lymph ducts
+before draining into venous blood
Term
Principal Trunks
Definition
-lumbar
-intestinal
-jugular
-subclavian
-bronchomediastinal
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