The Lymphatic System Overview, Animation
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- เผยแพร่เมื่อ 26 ก.ย. 2024
- (USMLE topics) The circulatory and immune functions of the lymphatic system.
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Voice by: Ashley Fleming
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In a nutshell, the lymphatic system is a drainage system that removes excess fluid from body tissues and returns it to the bloodstream. It is actually a subsystem of both the circulatory and immune system.
The major purpose of the circulatory system is to bring oxygen and nutrients to body tissues and remove wastes. This exchange happens in the smallest blood vessels called the capillaries. Blood plasma containing nutrients moves out of capillaries at the arterial end of capillary beds, while tissue fluid containing wastes reabsorbs back in at the venous end. However, not all of the fluid is drawn back to the bloodstream at this point. About 15% of it is left in the tissues and would cause swelling if accumulated. This is where the lymphatic system comes into play, it picks up the excess fluid and returns it to the circulatory system.
Unlike the blood circulatory system, which is a closed loop, the lymphatic system is a one-direction, open-ended network of vessels. Lymphatic vessels begin as lymphatic capillaries made of overlapping endothelial cells. The overlapping flaps function as a one-way valve. When fluid accumulates in the tissue, interstitial pressure increases pushing the flaps inward, opening the gaps between cells, allowing fluid to flow in. As pressure inside the capillary increases, the endothelial cells are pressed outward, closing the gaps, thus preventing backflow. Unlike blood capillaries, the gaps in lymphatic capillaries are so large that they allow bacteria, immune cells such as macrophages, and other large particles to enter. This makes the lymphatic system a useful way for large particles to reach the bloodstream. It is used, for example, for dietary fat absorption in the intestine.
Once inside lymphatic vessels, the recovered fluid is called lymph. Lymph flow is enabled by the same forces that facilitate blood flow in the veins. It goes from lymphatic capillaries to larger and larger lymphatic vessels and eventually drains into the bloodstream via the subclavian veins. On the way, it passes through a number of lymph nodes, which serve as filters, cleansing the fluid before it reaches the bloodstream.
Lymph nodes are small bean-shaped structures scattered throughout the lymphatic network. They are most prominent in the areas where the vessels converge. Lymph nodes contain macrophages and dendritic cells that directly “swallow up” any pathogens, such as bacteria or viruses, that may have been taken up from an infected tissue. They also contain lymphocytes: T-cells and B-cells, which are involved in adaptive immune response, a process that produces activated lymphocytes and antibodies specific to the invading pathogen. These are then carried by the lymph to the bloodstream to be distributed wherever they are needed.
The lymphatic system also includes lymphoid organs. Primary lymphoid organs - the thymus and bone marrow, are the sites of lymphocyte production, maturation and selection. Selection is the process in which lymphocytes learn to distinguish between self and non-self, so they can recognize and destroy pathogens without attacking the body’s own cells. Mature lymphocytes then leave the primary for the secondary lymphoid organs - the lymph nodes, spleen, and lymphoid nodules - where they encounter pathogens and become activated.
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I have been studying the lymphatic system since the beginning of the semester. I even went to a peer tutor, who sucked at explaining it and did not even know what he was saying. yet in just 4 minutes, you pulled everything together and made it make sense. Thank you so very much. You are saving lives!
Gaby Chronicles yep my tutors sucked too
Dont
Agree
Look up yahkiawakened
@@IDeclare wat course does he teach
This is way clearing than a 45 minutes lesson in High school. Thank you.
I think you forgot another line in your name
yes
@@princesshopetahura62 🦦
Finally! Watched so many explanations, but your video finally cleared for me how these systems work. Thank you!
Right this video is really fantastic🤘😝🤘
Same to you dear every confusion is clear 👍
can you help mee please i have 2 years with this problem
I'm a medical office administration student taking anatomy right now. Your videos are a huge help to watch before we start a new topic as an introduction and helps me not get so lost. :)
The best lymphatic system video I’ve come across,understood everything in just 4 minutes!
Cant believe these 4 minutes were way more usefull than a damn 40min lecture of our professor
THAT PART!! 🎯
I always didnt understand the lymphatic system since high school until university, this 4 min video explains all, thank you so much
I have taken up trampoline exercises for this reason in addition to the increased cardio workout without the jarring on the joints. Plus it’s fun to bounce - even a simple health bounce each day drains the system 🙌🏼
fast yet CLEAR explanation of the lymphatic system! Loved how you give explanation about the 'selection' bc I did not know what that meant lol! Thank you for your hard work put into this video. I have seen a couple of videos of yours - I will be following your page! Thank you again!
I LOVED how your video thoroughly explains the concepts. Thank you so much!!!
based on this video, this might be the best science channel. brief, concise, to the point, not a word wasted. every sentence is easy to understand conceptually. fantastic!
Thank god ive discovered this channel. You guys rock!!! So many incredible explanations
I am class 10th student here
I shouldnt judged a video by its thumbnail. This vid is clear and simple, rlly like it.
Really well explained... Saved my time and cleared my concepts.
This was THE best video for lymphatic system, my goodness that was amazing. Everything is clear to me now. Liked it!
your explanations are literally the best thing on youtube I've ever seen
This video clear all the dauts related to lymphatic system. Thanks a lot
thank you so muuch! now i can report this topic easily
Thank you so muchh i finally understand the lymphatic system and it feels amazing!
Im doing level three anatomy and physiology for beauty therapy and this really helped me!
This is the best explanation on lymphatic circulation I’ve seen so far.
thank you. i was searching this for years
the clearest lymphatic video ever. thank you.
so much information in 4 minutes!!! but I learned A LOT. the lymphatic system is soooooo important. even now more than ever
I love this video, you made my day. Please make more videos. You taught Anatomy and Physiology in the easiest way possible. Thank you so much. ❤keep up the great work
Best explanatory video about lymphatic system ever.
hands-down best explanation on youtube
Amazing video .I study from different video lectures but I cannot understand what is lymphatic system,how it's work.But after watching this animation not only my concept is clear but I remember it,and I can easily gain marks in exams ...
Love you guys who teach like this with animations
Amazing teaching .... that we can understand in one video .... with a correct explanations and it was interesting 😘
Thank-you very much for giving us knowledge
Just amazing! You have to stop and ask yourself where all this come from.
Simplified n loving
Best explaination ever brief but very precise. Thanks for making it easier for us.
Glad it was helpful!
This video is great 😃👍 the explanation is so simple and understanding, less than a minute I understood everything on lymphatic system
Struggling college student here, very good video. Thank you.
Legend has it:
Bad teachers take lectures
Good teachers write books
The best teachers make TH-cam videos :)
bro you are the best, i have never had sutch a clear explanation. Thank you!!!
Great video!!
Finally! right to the point video.
Thank you!!!
Damn that was really simple, I kinda feel smart now xD
Thank you for Teaching
Very interesting and well explained information. Maybe it is just me but the lymphatic system seems to be one of the lesser known processes of the body at least as far as the lay person is concerned but no less interesting for all that. Thank you! Blessings and peace
George Alderson
It’s not just you! This system is not part of modern medicine, except when there’s a disease, like lymphoma. This is sad, because if people understood how important it was to keep the lymph from stagnating, a lot of illness could be prevented. A great way to move the lymph is to jump on a mini trampoline.
@@flexnetuser2268 Really? If you bounce OFF too hard it is seems a good way of leaking lymph and blood all over the place too haha
@@flexnetuser2268 dancing and walking also
Thank you for this video! Great explanation of how the lymphatic system functions!
finally i am able to understand the lymphatic system just because of you....thanks
thank you very much. very clear and precise explanation!
I have been struggling to understand lymphatic system ever since I firstly Heard of it. That was, I don't know... 6 years ago? It is kind of hilarious that 4 minute video explained everything, that I haven't been able to understand for such a long period. Thanks 🙏
concept clarification is very fab
You are a good man and a teacher thank you God bless you for the act
You guys are awesome... I had soo many confusion about this topic but this video clears all of them... 👌👍👌👍
omg THANK YOU for this video! made it so much easier for me to understand
I'm so glad!
Very straightforward
Very good much informative in less time
Love the exp & also the accent is great 👏
Thank you for the clear explanation. Im really appreciating 👍👍👍
Awesome
The "lymphatic" fluid passes through the lymph nodes before returning to the circulatory system, and pathogens are "filtered" or destroyed by the macrophages, WBC's and beneficial bacteria, but what happens to cellular or metabolic waste? Do you have an explanation? Remember that up until 2015 medical schools were teaching that the brain did not have a lymphatic system, that being said, are we certain of the physiology and true role the lymphatic system plays in the human body?
A healthy body will have nothing to filter.... only when there is inflammation as in infection ... malignancy.. etc we hav debris that is when there will b lymphadenopathy...... so u decrease that swelling via antibiotics or anti inflammatory drugs or chemotherapy or surgery
Only when it starts swelling or has collected waste....u will come to know that something is wrong going on in the body.... understood dear
Can you elaborate?
Lymph nodes don't have the ability to rid the fluid of metabolic waste. But remember that the lymph does flow back into the blood stream at the subclavian veins where it rejoins the blood supply. Once in the blood the lungs, liver and kidneys can now do the job of filtering out carbon dioxide and other metabolic wastes.
Metabolic waste going to lymphatic system and then to the kidneys (skin also). Watch Dr. Morse video's
Madam thanks a lot for this detailed vedio on Lymphatic system. Kindly up load a vedio on Lypoma, it's causes and remeady. 🙏🙏🙏
Crystal clear maam thank you
Thank you very much
Very good explanation.
Our bodies are amazing!
Yes. If drs would leave us alone with their poisons and not mess up out immunity and God given right to live a healthy life without poisoning our body with man made chemicals.
Better video than "crash course"
Thank you so much….so so amazing and simple🥺🤏🏻💛💛💛
Body system well explained and just enquire myself does this complete knowledge to any prevention of viruses without appropriate actions . Thank you for sharing it was knowledgeable to know physical.😍👍🙏.
Thank you for the wonderful explanation 😊 May God make all your wishes in life come true.
Class notes confused me , this Helped so much thank you !
Awesome, thanks 👍
Tnx for your efforts 🙏 in explaining a clean and beautiful
Beautiful, beautiful, beautiful explanation 👏🏼👏🏼
Glad you liked it!
perfect explanation
Sweet voice with smart explanation
Simplicity is beautiful
well summarized and nicely delivered
Thank you so much now my all doubts are clear.
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Many Thanks!
I will DEFINITELY return, for several more viewings!
Thanks for the info guys.
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Perfect explanation. Could you make a follow up video about hidradenitis suppurativa or Akne Inversa explaining how this lymph system and other systems function for this specific disease?
that helped me understand so much!!!
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Nice explaination
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Very clear explanation. Thanks.
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Thank you,the video was very helpful to me
Thank you! Good visual explanation of a marvelously designed system
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Thanks 😊
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Thanks for no bakeground music
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Easy to understand and very helpful, thank you:)
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