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Understanding the Lymphatic System: A Key to Immunity

Explore the intricate network of lymphatic vessels, nodes, and the role of lymphocytes in defending the body against pathogens. Learn how lymph maintains fluid balance and transports lipids. Discover the structure of lymph nodes and their vital functions in immune response.

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Understanding the Lymphatic System: A Key to Immunity

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  1. MICROBIOLOGY – ALCAMO LECTURE: Immune System, Lymph Node Introduction

  2. The Lymphatic System • The _______________________ defends the body from foreign invasion by disease causing agents such as viruses, bacteria, or fungi.

  3. The Lymphatic System • Part of the immune system made of a network of __________________that carry a clear fluid called _________ in one direction - _____________________ • Also includes structures dedicated to the circulation and production of lymphocytes (_________, _________, _____________, __________________, _________, etc)

  4. The Lymphatic System • Blood does not directly come in _________ with the cells and tissues in the body • Parts of the blood first exit the blood vessels to become _________________, which comes into contact with the cells of the body. • _________ is formed when interstitial fluid enters the initial _______________

  5. The Lymphatic System • _________ and _________ interstitial fluid, including plasma protein to the blood, and thus helps maintain fluid balance  • _________ the body against disease by producing lymphocytes • _________ lipids from the intestine and transport them to the blood

  6. Lymph Node • __________________________________distributed widely throughout the body including the armpit and stomach/gut and linked by lymphatic vessels • __________________ are found all through the body, and act as _________ or traps for foreign particles • They are important in the proper functioning of the __________________

  7. Lymph Node Structure • Pericapsular Connective Tissue and Fat Tissue which clings to outside of node, holds node _________, _________it, ready supply of _________ for energy B. Capsule • Dense outer covering which ________________ • ________________ – inner branches of capsule

  8. C. The Substance of the lymph node is divided into: • __________________ • __________________ • D. Germinal Centers • Dense, darkly stained round areas just inside the capsule where certain ___________________________

  9. Vessels • Multiple _________ lymph vessels bring _________ into the _________________ • The _________ gets slowly _________ through the substance of the lymph node where it encounters ___________ • The _________ lymph vessel carries the lymph ____________________________

  10. Vessels • Artery • __________________________________from heart to node • Has a _______________ and quite small inside diameter • May contain visible _________________

  11. Vessels • Vein • Carries __________________from node to heart • Has a __________________and larger inside diameter than the artery • May contain visible blood cells

  12. Vessels • Lymph • Has almost _________ _________ • Has a very large inside _________ • Never contains _________ blood cells

  13. Maintain the pressure and volume of extracellular fluid by returning excess water and dissolved substances from the interstitial fluid to the circulation

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