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The Lymphatic System

A part of the presentation;

Goals
1- Discuss the organization of the lymphatic system, including the vessels, principal lymph nodes, thymus, and spleen
2- Explain the relationship between the lymphatic and circulatory systems, and the role of lymphoid tissue structures and lymphocytes in the body’s defense

Overview of the Lymphatic System:
Includes, vessels, fluid, and nodes or nonsecreting “glands”.
Lymphatic vessels convey fluid from the periphery to the veins.
The fluid, lymph (=clear spring water), is what seeps out of the blood at the peripheral capillaries. Composition is similar to plasma without the proteins
Lymphatic organs or tissues (“glands”) are filtering areas and arenas of lymphocyte maturation and competency.

Major Functions of Lymphatic System:
Filtration of lymph
Return of seeped fluid to c.v. system
“Education” and production of immune system lymphocytes
Transport of digested lipids from small intestinal lacteals

Lymph Capillaries:
Thin walled endothelium (no BM) with periodic one way valves. In general they parallel veins.
Closed ends allow fluid flow inward only
Pick up and recycle extra tissue fluid

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Author: Unknown

Tags: Lymphatic vessels , Lymphocytes , Types of Lymphocytes , Lymphoid Tissue , Lymph Nodes , Spleen

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