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Cards In This Set
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Functions of Lymph System
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Fluid balanceFat Absorption (chyne = fat and fat-soluble molecules which are absorbed by lacteals instead of hepatic portal system)Defence
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Lymphatic Vessels
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Lymph Capillaries: v. permeableLymph Vessels: have valvesLymph Nodes: way stations that filter lymphLymph TrunksLumph Ducts: move lymph to major veins
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Lymphatic Tissue & Organs Contain
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Lymphocytes (T-Cells and B-Cells)Fine collagen reticular fibers that filter and trap MOs and particlesMALT Encapsulated Organs
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What is MALT (Mucosa Associated Lymph Tissue)?
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It prevents bacteria from entering mucous-y areas
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What is diffuse lymphatic tissue?
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Dispersed cells
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What are Lymphatic Nodules?
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Dense aggrigations of cells
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Give two examples of Lymphatic Nodules:
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Peyer's Patches (in gut)MALT (elsewhere in body)
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What are the three classifications of tonsils?
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PalatinePharyngealLingual
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Lymph Nodes
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Cortex & MedullaWith dense CT capsule and reticular fibers for supportRemove unwanted substancesHave many afferent (to) vessels and only one efferent (exit) vessel --> one way flow
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How is one-way flow achieved in lymph nodes?
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Many afferent vessels, only one efferent vessel
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Spleen
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CapsuleWhite pulp associated with ArteriesRed pulp associated with VeinsFilters bloodHas a splenic cord made of reticular fibers to maintain structureFiltration by lymphocytes and macrophage
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Functions of the Spleen (3)
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1. Destroy defective RBCs2. Detect & respond to foreign substances3. Reservoir for blood
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What vessel is white pulp associated with?
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Arteries
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What vessel is red pulp associated with?
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Veins
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Thymus
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In mediastinum, in front of heartHas no reticular fibersCortex with lymphocytes, medulla with fewSite of maturation of T-cells
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