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VIII. The Lymphatic System. 1. Introduction. Gray, Henry. 1918. Anatomy of the Human Body. The lymphatic capillary plexuses vary greatly in form; the anastomoses are usually numerous; blind ends or cul-de-sacs are especially common in the intestinal villi, the dermal papillæ and the filiform papillæ of the tongue. Lymphatic capillaries are probably absent in the central nervous system, the meninges, the eyeball (except the conjunctiva), the orbit, the internal ear, within striated muscle, the liver lobule, the spleen pulp and kidney parenchyma. The lymphatic vessels are supplied by nutrient vessels, which are distributed to their outer and middle coats; and here also have been traced many non-medullated nerves in the form of a fine plexus of fibrils. www.bartleby.com /107/175.html   (2816 words)

Lymphatic system - Wikipedia, the free encyclopedia The lymphatic system, which transports infection-fighting cells called lymphocytes, is involved in the removal of foreign matter and cell debris by phagocytes and is part of the body's immune system. Lymphatic tissue is also found in other parts of the body, including the stomach, intestines, and skin. The thymus and bone marrow are the primary lymphatic organs. en.wikipedia.org /wiki/Lymph   (1046 words)

Lymphatic system -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-21) Lymphatic vessels carry lymph, a colorless, watery fluid originating from (Liquid found between the cells of the body that provides much of the liquid environment of the body) interstitial fluid (fluid in the tissues). The enriched lymph originating in the lymphatics of the small intestine is called (A milky fluid consisting of lymph and emulsified fats; formed in the small intestine during digestion of ingested fats) chyle. Whenever the lymphatic system cannot drain interstitial fluid from tissues faster than they accumulate, the resulting swelling is known as (Swelling (usually in the legs) caused by lymph accumulating in the tissues) lymphedema. www.absoluteastronomy.com /encyclopedia/l/ly/lymphatic_system.htm   (1050 words)

MSN Encarta - Lymphatic System Lymphatic System, common name for the circulatory vessels or ducts in which the fluid bathing the tissue cells of vertebrates is collected and carried to join the bloodstream proper (see Lymph). The lymphatic system is of primary importance in transporting digested fat from the intestine to the bloodstream; in removing and destroying toxic substances; and in resisting the spread of disease throughout the body. The lymphatic capillaries are more permeable than ordinary capillaries and allow passage of larger particles than would ordinarily pass through capillary walls; large-molecule proteins, produced as a result of tissue breakdown, pass into the lymphatics for transport away from the tissues. encarta.msn.com /encnet/refpages/RefArticle.aspx?refid=761566336   (629 words)

WHO | Lymphatic filariasis These worms lodge in the lymphatic system, the network of nodes and vessels that maintain the delicate fluid balance between the tissues and blood and are an essential component for the body's immune defence system. Until very recently, diagnosing lymphatic filariasis had been extremely difficult, since parasites had to be detected microscopically in the blood, and in most parts of the world, the parasites have a "nocturnal periodicity" that restricts their appearance in the blood to only the hours around midnight. Lymphatic filariasis exerts a heavy social burden that is especially severe because of the specific attributes of the disease, particularly since chronic complications are often hidden and are considered shameful. www.who.int /mediacentre/factsheets/fs102/en   (1306 words)

Lymphatic Malformations (Cystic Hygroma): Symptoms, Diagnosis & Treatment   (Site not responding. Last check: 2007-10-21) Cervicofacial lymphatic malformations (lymphatic birthmarks) may be associated with the overgrowth of the mandibular body. Lymphatic malformations of the floor of the mouth and tongue are usually characterized by vesicles, swelling, and bleeding. Lymphatic malformations of the orbit typically cause proptosis (sudden proptosis is usually due to intralesional bleeding), which may require surgical or interventional decompression to save the optic nerve. www.birthmarks.us /LM.htm   (843 words)

Electo-Lymphatic Drainage Lymphatic drainage is an advanced therapy in which the practitioner uses a range of specialized and gentle rhythmic pumping techniques to move the skin in the direction of the lymph flow. Lymphatic Drainage clears blockages, eliminates metabolic wastes and toxins from the body, transports nutrients to cells and increases metabolic efficiency, all adding to the reduction of excess fluid and assisting weight reduction. Lymphatic Drainage is also a very successful beauty treatment for the face, improving the appearance of the skin and reducing puffiness. www.thenac.net /lymphatic_drainage.htm   (490 words)

Lymphatic Filariasis Facts   (Site not responding. Last check: 2007-10-21) Lymphatic filariasis [lim-FA-tick fil-uh-RY-uh-sis] is a disease of the tropics. Lymphatic filariasis is a disease of the tropics. Lymphatic filariasis is rarely fatal, but it can cause recurring infections, fevers, severe inflammation of the lymph system, and a lung condition called tropical pulmonary eosinophilia (TPE). www.astdhpphe.org /infect/Lymphfil.html   (671 words)

Introduction to the Lymphatic System Within the lymphatic capillaries there are one-way valves that ensure the continued flow of the lymph away from the tissues. Smooth muscles in the walls of the lymphatic vessels cause the angions to contract sequentially to aid the flow of lymph toward the thoracic region. The terminus is the area at the base of the neck where the lymphatic ducts return lymph to the circulatory by emptying into the subclavian veins. www.lymphnotes.com /article.php/id/151   (1083 words)

The Lymphatic System Closely connected with the blood and circulatory system, the lymphatic system is an extensive drainage system that returns water and proteins from various tissues back to the bloodstream. The major lymphatic vessel is the thoracic duct, which begins near the lower part of the spine and collects lymph from the lower limbs, pelvis, abdomen, and lower chest. major lymphatic vessel, which begins near the lower part of the spine and collects lymph from the lower limbs, pelvis, abdomen, and lower chest; lymph flowing through the duct eventually empties into a large vein in the upper chest and returns to the bloodstream. www.gorhams.dk /html/the_lymphatic_system.html   (1606 words)

LYMPHATIC - Definition [See {Lymphate}.] {Lymphatic gland} (Anat.), one of the solid glandlike bodies connected with the lymphatics or the lacteals; -- called also {lymphatic ganglion}, and {conglobate gland}. {Lymphatic temperament} (Old Physiol.), a temperament in which the lymphatic system seems to predominate, that is, a system in which the complexion lacks color and the tissues seem to be of loose texture; hence, a temperament lacking energy, inactive, indisposed to exertion or excitement. (Anat.) One of the lymphatic or absorbent vessels, which carry lymph and discharge it into the veins; lymph duct; lymphatic duct. www.hyperdictionary.com /dictionary/lymphatic   (100 words)

Breakthrough in understanding of hereditary disease of lymphatic vessels Lymphatic vessels normally remove fluid and proteins escaping from blood capillaries into surrounding tissues, and lymphedema is characterized by the disabling swelling of legs, and sometimes arms, that results when the lymphatic vessels are unable to clear the lymph from the tissues. The team found that the lymphatic vessels of LD patients are abnormally shaped and covered with smooth muscle cells that are usually present only on blood vessels and on larger, collecting lymphatic vessels. This is the first study that describes a gene critical for the formation of lymphatic valves, and regulation of the interaction between lymphatic endothelial cells and vascular smooth muscle cells. www.eurekalert.org /pub_releases/2004-08/lifc-biu081904.php   (364 words)

Lymphoma Information Network - The Lymphatic System The lymphatic system defends the body from foreign invasion by disease causing agents such as viruses, bacteria, or fungi. The lymphatic system consists macroscopically of: The bone marrow, spleen, thymus gland, lymph nodes, tonsils, appendix, and a few other organs. Lymphatic vessels prevent the backflow of the lymph fluid. www.lymphomainfo.net /lymphoma/lymphsys.html   (356 words)

THE MERCK MANUAL--SECOND HOME EDITION, Introduction in Ch. 37, Lymphatic Disorders Lymphatic vessels, located throughout the body, are larger than capillaries, and most are smaller than the smallest veins. Lymphatic vessels also collect and transport damaged cells, cancer cells, and foreign particles (such as bacteria and viruses) that may have entered the tissue fluids. The lymphatic system may not perform its function adequately when the quantity of fluid is excessive or when the lymph vessels or nodes become blocked by a tumor or become inflamed. www.merck.com /mmhe/sec03/ch037/ch037a.html   (310 words)

The Lymphatic System There are specialists in manual lymphatic drainage, a very delicate massage technique taught in Austria (called the Vodder method) who are trained to help reroute lymph flow so as to by-pass the normal channels, the ones that have been removed. The vein is a one-lane highway taking away the used blood, and the lymphatic channels are the other one-lane highway draining away the lymph fluid. Experts call the lymphatic system a secondary circulatory system, because it assists the bloodstream with millions of tiny ducts that collect tissue fluid not needed by the capillaries or skin and returns it to the heart for recirculation. www.healthychristianliving.com /lymphatic_system.htm   (1605 words)

The Lymphathic The lymphatic system consists of the lymphoid organs, which are spread throughout the body. The lymphatic system and lymphoid organs get their name because they are concerned with the growth, development, and deployment of lymphocytes, white blood cells that are key to the immune system. The lymphatic vessels are the arteries that carry white blood cells throughout the body. www.aim4health.com /lymphatic.htm   (1222 words)

MedlinePlus Medical Encyclopedia: Lymphatic obstruction   (Site not responding. Last check: 2007-10-21) Lymphatic obstruction involves blockage of the lymph vessels, which drain fluid from tissues throughout the body and allow immune cells to travel where they are needed. This occurs because the lymphatic drainage of the arm passes through the axilla (armpit), and tissue in the axilla has been removed during mastectomy. Lymphoscintigraphy is an alternative technique in which a radioactive substance that concentrates in the lymphatic vessels is injected into the affected tissue and mapped using a gamma camera, which images the location of the radioactive tracer. www.nlm.nih.gov /medlineplus/ency/article/001117.htm   (834 words)

AllRefer.com - lymphatic system (Anatomy And Physiology) - Encyclopedia   (Site not responding. Last check: 2007-10-21) lymphatic system[limfat´ik] Pronunciation Key, network of vessels carrying lymph, or tissue-cleansing fluid, from the tissues into the veins of the circulatory system. The fluid that flows through the lymphatic system is functionally important because it contains substances having large molecules (such as proteins and bacteria) that cannot enter the small pores of the venous capillaries. Along the lymphatic network in certain areas of the body (neck, armpit, groin, abdomen, chest) are small reservoirs, the lymph nodes, which collect bacteria and other deleterious agents from the lymph which passes through them, and act as a barrier against the entrance of these substances into the bloodstream. reference.allrefer.com /encyclopedia/L/lymphati.html   (472 words)

Division of Parasitic Diseases - Lymphatic Filariasis Fact Sheet Lymphatic filariasis is a parasitic disease caused by microscopic, thread-like worms. Lymphatic filariasis affects over 120 million people in 80 countries throughout the tropics and sub-tropics of Asia, Africa, the Western Pacific, and parts of the Caribbean and South America. Lymphatic filariasis is a leading cause of permanent and long-term disability worldwide. www.cdc.gov /ncidod/dpd/parasites/lymphaticfilariasis/factsht_lymphatic_filar.htm   (689 words)

lymphatic system --  Encyclopædia Britannica The lymphatic system helps maintain fluid balance in the body by collecting excess fluid and particulate matter from tissues and depositing them in the bloodstream. After a chemical crosses the transport barrier at the portal of entry, it remains in the interstitial spaces, the spaces between cells that are filled with water and loose connective tissue. The major parts of the system are the lymph nodes, tonsils, thymus, spleen, and lymphatic vessels; additional lymphatic tissue is found in isolated patches in the gastrointestinal tract, lungs, and bone marrow. www.britannica.com /eb/article-9105688   (844 words)

2004 GRC on Molecular Mechanisms In Lymphatic Function & Disease The physiology and human genetics of the lymphatic system will be explored and there will be a focus upon mechanisms of cancer metastasis and its relationship to lymphatic function and lymphangiogenesis. While historically somewhat neglected, investigations in lymphatic biology have experienced a dramatic and exponential growth within the last 2 to 5 years, in large part ascribable to the availability of enhanced techniques and tools for these investigations. There is an unprecedented need for lymphatic biologists and investigators to have a forum in which to conduct a dialogue surrounding scientific developments in this field and to determine the direction of future investigative efforts. www.grc.uri.edu /programs/2004/lymphat.htm   (723 words)

Dorlands Medical Dictionary It may be congenital, due to abnormality of the lymphatic system (as in Milroy's disease), or acquired, due to involvement of the major intestinal lymphatic ducts by inflammatory processes or neoplasm, or to increased lymphatic pressure, as in valvular heart disease and constrictive pericarditis. carcinomato´sa a pseudoinflammatory lesion of the lymphatic vessels of the peritoneum, with edema of the area and proliferation of fibrous tissues around the vessels, due to the infiltration of cancer cells from peritoneal tumors. (lim´fo-gram) a radiograph of the lymphatic vessels and lymph nodes. www.mercksource.com /pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszSzuszSzcommonzSzdorlandszSzdorlandzSzdmd_l_16zPzhtm   (3721 words)

· LYMPHATIC SYSTEM This problem is avoided by the presence of lymphatic vessels that act as "drains" to collect the excess fluid and return it to the venous blood just before it reaches the heart. Networks of lymphatic capillaries are located in the intercellular spaces and are widely distributed throughout the body. Although there is no muscular pumping organ connected with the lymphatic vessels to force lymph onward as the heart forces blood, still lymph moves slowly and steadily along its vessels. linux.cayuga-cc.edu /greer/biol204/lymphatic1/lymphatic1.html   (867 words)

VAT: The Lymphatic System   (Site not responding. Last check: 2007-10-21) The lymphatic system in most animal species is the most important physiological system of combating foreign bodies such as viruses, bacteria, or fungi. The lymphatic system varies from animal to animal, but in humans, it consists macroscopically of: The bone marrow, spleen, thymus gland, lymph nodes, tonsils, appendix, and a few other organs. However, the functioning of the lymphatic system is most easily seen at the microscopic level where the white blood cell is the single most important element. www.acm.uiuc.edu /sigbio/project/updated-lymphatic/lymph1.html   (354 words)

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