Download - The Lymphatic System
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The Lymphatic System
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Roles of the Lymphatic System
1) One-way drainage system
2) Lipid Absorption from Small Intestine
3) Produce & circulates Immune cells.
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• Valves in lymphatic vessels prevent backflow of lymph.
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Lymphoid Tissues:Un-encapsulated lymphatic tissues
Tonsils1) Pharyngeal
2) Palantine
3) Lingual
Tonsil located in strategic locations
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Lymphoid Tissues
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Lymphoid Organs:Surrounded by fibrous capsule (encapsulated)
Lymph Nodes
Thymus
Spleen
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Structure of a Lymph Node
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Derivation and Distribution of Lymphocytes
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The Thymus
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The Thymus
• Behind the sternum (in anterior mediastinum)
• Where T cells Differentiate
• Involution (gets smaller) post puberty
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The Spleen
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The Spleen
• Largest mass of lymphoid tissue in body
• Same functions for whole blood as lymph nodes for lymph