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\nThe Lymphatic System | Health | Biology | FuseSchool\n

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\nThe Lymphatic System | Health | Biology | FuseSchool Did you know your body has its own version of a sewer system, for removing unwanted toxins, waste and excess water from the body? This is called our lymphatic system. Like our blood...\nThe Lymphatic System | Health | Biology | FuseSchool Did you know your body has its own version of a sewer system, for removing unwanted toxins, waste and excess water from the body? This is called our lymphatic system. Like our blood circulation, the lymphatic system is made up of millions of little vessels that branch all around our body. But whereas arteries and veins carry blood, the lymphatic vessels are much, much finer and carry a colourless fluid called lymph. Our lymphatic system has 3 main duties: (1) It contains white blood cells called lymphocytes, which are used to fight infection; (2) It acts as a one way drainage system, transporting fluid from body tissues into the blood circulation; (3) It gets rid of waste products produced by cells. As blood circulates the body, plasma leaves the blood vessels and travels into the body tissues, delivering food, oxygen and hormones to the cells. This plasma becomes tissue fluid, and surrounds all of our body’s tissues. It then collects waste products, excess water and toxins from the cells. 90% of this fluid passes back into the blood circulation; however, 10% of the fluid is left behind and is known as lymph. We therefore need a system to drain this lymph fluid, so that we don’t end up as a swollen fluid filled balloon - hence the lymphatic system... The lymph fluid drains into lymph vessels, where it then travels to lymph nodes, which are found all around your body. To stop back-flow, the lymph vessels have one-way valves and muscular walls that contract to force the lymph forward. This is happening in millions of little lymphatic vessels in your body every minute of every day! The lymph nodes filter the lymph, destroying or trapping anything harmful. The lymph nodes contain white blood cells called lymphocytes, which attack and break down bacteria, viruses, damaged cells or cancer cells. This filtering and destroying is an important part of our immune system, and stops nasty substances from being fed back into our bloodstream which would make us sick. The waste products and destroyed bacteria are then carried in the lymph fluid through larger lymph vessels up to your neck, where the thoracic duct empties the lymph back into the blood circulation. The bloodstream then removes the waste products from the body, as it does with other waste. As well as the lymph fluid, lymph vessels and lymph nodes, our lymphatic system also includes a few organs: the spleen, thymus, tonsils and adenoids. They all have roles in helping our body fight off infections. Unfortunately, like any sewer system, things can go horribly wrong. Sometimes we get infections that cause the pumping to break down. This can cause your arms or legs to swell to huge proportions. Sometimes the debris or other bad substances can make it past lymph nodes. Sometimes cancer cells do this and spread the cancer to other parts of the body, which obviously isn’t good. For now, we wish you all the best for your lymphatic health – which you can help maintain by drinking lots of water and exercising. KEEP ON PUMPING! CREDITS Animation & Design: Joshua Thomas jtmotion101@gmail.com Narration: Dale Bennet Script: William Haines SUPPORT US ON PATREON SUBSCRIBE to the FuseSchool YouTube channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT. VISIT us at www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you. These videos can be used in a flipped classroom model or as a revision aid. Find all of our Chemistry videos here Find all of our Biology videos here Find all of our Physics videos here Find all of our Maths videos here Instagram Facebook Twitter Access a deeper Learning Experience in the FuseSchool platform and app: www.fuseschool.org Follow us Befriend us This is an Open Educational Resource. If you would like to use the video, please contact us: info@fuseschool.org\n
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12th - Higher Ed
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Instructional Videos
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2019
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