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Lymphatic System . Rachel Luu Tommy Nguyen . Structure . Lymphatic Vessels - Lymph : A clear to yellowish watery fluid that circulates through body tissues filtering out fats, bacteria, and other unwanted materials.
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Lymphatic System Rachel Luu Tommy Nguyen
Structure • Lymphatic Vessels - Lymph: A clear to yellowish watery fluid that circulates through body tissues filtering out fats, bacteria, and other unwanted materials. • Due to the pumping of the heart, some fluids are forced out of the capillaries. • 85% is reabsorbed into the lymphatic capillaries • The 15% left is then absorbed by the lymphatic vessels which is then carried to the cardiovascular system.
A. Lymphatic Capillaries • Leaks fluid along with oxygen and nutrients through the thin walls as a result of the pumping of the heart. • The valves inside the lymph capillaries act similar to veins and keep the flow of lymph towards the heart. • Muscular contraction and breathing also help lymph flow towards the heart.
II. Disease – Lymphedema • Lymphedema is a collection of “fluid” that causes swelling (edema) in the arms and legs. • Can be inherited by an autosomal dominant trait. • Can also be obtained by a disruption in the lymphatic vessel. • The 15% left over fluid that cannot be absorbed by the lymphatic vessel builds up over time.
B. Treatment Most common treatments are: • Range of Motion Exercises • Compression (bandages or sleeves) • Manual Lymph Drainage • Surgery for excess tissue (not a cure)
10 Key facts • The lymphatic system services the immune system by destroying pathogens and filtering out waste allowing the lymph to be safely returned to the circulatory system. • The lymphatic system also aids circulatory system to deliver hormones, oxygen, and nutrients from the blood to the cells that make up the tissues of the body. • Lymph is a colorless fluid containing white blood cells, which bathes the tissues and drains through the lymphatic system into the bloodstream. • The lymphatic system selects, collects, and recycles fluids that are leaked from the cardiovascular system and prevents/fights infections. • The Lymphatic system is made up of lymphatic vessels, lymphatic capillaries, lymph nodes, and lymph tissue such as: tonsils, thymus, spleen, and bone marrow (inside the bone)
10 Key Facts Continued • Breathing, stretching, and the bending of the joints can increase the productivity of the lymphatic system • The lymphatic system helps maintain fluid balance, homeostasis, in the body by collecting excess fluid and depositing them in the bloodstream • Lymphatic Vessels are ran parallel to blood veins, carrying lymph fluids that contain oxygen, minerals, and protein • Lymphatic Capillaries take in interstitial fluid or tissue fluid, lymph and nutrients that “float” around cells, sending them back into the blood stream or back to the heart • Lymph Nodes filter germs, viruses, bacteria, and anything foreign from lymph. Lymphocytes, a type of white blood cell, destroys these germs, viruses, and bacteria.
Bibliography • Johnson, George B., and Peter H. Raven. Holt Biology. Orlando, Florid: Holt, Rinehart and Winston, 2007. Print. • N., Piller, and O’Conner M.O. "THE LYMPHOEDEMA HANDBOOK Causes, Effects and Management." Web. 30 Apr. 2012. <http://www.hospicecare.com/Bookstore/Reviews/br38.htm>. • Rockson, S.G. "The Lymphatic Research Foundation." Web. 30 Apr. 2012. <http://www.lymphaticresearch.org/main.php?content=continuum>. • "Understanding the Lymphatic System." Lymph Notes: Lymphedema Information, Books, and Support. Web. 30 Apr. 2012. <http://www.lymphnotes.com/article.php/id/151/>.
