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Lesson Plan PowerPoint Presentation Present Model Take Quiz Take Test

The Lymphatic System Created By: Kyle Willour and Noah Sanchez

Role The Lymphatic system plays an important role in immunity Three principle functions: 1.Collect and return tissue fluid to blood Preserves fluid balance Collects roughly 10% of the interstitial fluid, or tissue fluid, and protein that accumulates in the fluid. 2.Defend body against disease organisms 3.Absorb lipids from digestive system Offshoot of the Circulatory system and works with the Immune system Does NOT help the body heal itself from injuries or toxins in the air

Make Up Composed of: – Lymphatic Vessels – Lymph Tissue – Lymph Organs – Lymph Clear Fluid Tissue fluid that has entered the Lymph capillaries From Latin Lympha, meaning “Water Goddess”. Tiny capillaries with dead ends – Extends into all tissues of the body

Lymph Nodes Lymph nodes – Small organized mass of Lymph Tissue – Functions: Filter Lymph as it passes through Produce Lymphocytes – Most numerous in neck, under arms, groin, and chest region

Lymph Nodes (Cont.) Lymph nodes can become swollen Swell for various diseases and infections – Anything from throat infections to terminal cancer – Swell because of an increase in Lymphocytes

Lymphocytes Lymphocytes are the white blood cells inside the Lymph node Two primary types of Lymphocytes: 1.B cells B cells are responsible for the production of antibodies Antibodies leave the node to track down and mark antigens for destruction 2.T cells Each cell is specialized to kill one type of virus Two main types of cells – Killer T cells » Coordinate the attacks on viruses and other foreign microorganisms – Helper T cells » Attack and destroy viruses and other foreign microorganisms Work with Macrophages Most Lymphocytes live for a max of a couple of months but some can survive for years – These cells have a “memory” of past antigens and as a result can offer a more rapid and vigorous response

How It Works Blood travels through arteries throughout the body Hydrostatic pressure, or blood pressure, forces plasma and small proteins out of the blood vessel into the surrounding tissue – Becomes tissue fluid – This fluid is rich in amino acids, salts, glucose, and oxygen – Acts as a nourishing bath for the tissue Lymphatic vessels absorb tissue fluid – Becomes Lymph – Only absorbs about 10% Other 90% is reabsorbed through the veins by Osmotic pressure Lymphatic vessels take the Lymph through the Lymph nodes where it gets filtered for pathogens – Lymph travels through the Lymph system by the pulsating of the Lymph veins Lymphatic ducts, specifically the Thoracic duct, bring the Lymph to the left subclavian vein in the neck where it is returned to blood circulation. – All Lymph moves in one direction only

Bib page The Naked Scientists." How The Lymphatic System Works -. N.p., n.d. Web. 04 Mar "LYMPHATIC SYSTEM AND IMMUNITY." Lymph and Immunity. N.p., n.d. Web. 04 Mar Zimmermann, Kim Ann. "Lymphatic System: Facts, Functions & Diseases." LiveScience. TechMedia Network, 08 Feb Web. 03 Mar "Immune and Lymphatic Systems." InnerBody. N.p., n.d. Web. 04 Mar N.p., n.d. Web.