Abdominopelvic Viscera – Lymphatic Drainage of Abdominopelvic Organs

by James Pickering, PhD

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    00:00 The lymphatic system throughout the body is vast and they are very small. So the actually vessels himself the afferent and the efferent vessels are very difficult to pick up themselves.

    00:12 But we can see the lymph nodes in most people if they become infected or they become full of the lymphocytes that they are busy in filtering out lots of debris and they can become swollen.

    00:28 We can see the lymph nodes in the groin. We can see some in the neck.

    00:32 But they are really associated with lots of organs and we have a high number of lymph nodes within the abdominopelvic cavity.

    00:42 Ultimately all of these lymph nodes are going to drain into the thoracic duct.

    00:47 They are going to drain into the thoracic duct, which we can see here.

    00:50 It runs next to the oesophagus within the thoracic cavity. And it actually drains into the junction between the left subclavian and internal jugular veins.

    01:03 Now, the vast majority of the lymph from the body is going to be draining into the thoracic duct and this diagram actually shows it nicely. All of the body that's covered in this kind of pinkish shading is one way or another going to drain into the thoracic duct.

    01:24 Only this upper right quadrants of the body doesn't and that drains via the right lymphatic duct.

    01:31 But the vast majority of it is passing through the thoracic duct into this region here. The junction of the left subclavian and the internal jugular veins.

    01:42 Now we're concentrating on the gastrointestinal tract.

    01:44 And lymph from the gastrointestinal tract drains into what are known as the pre-aortic lymph nodes.

    01:50 These pre-aortic lymph nodes are positioned anterior to the aorta, pre-aortic.

    01:58 And they were associated with the three unpaired arteries.

    02:02 So we have the coeliac trunk. We have the coeliac lymph node.

    02:06 We have the superior mesenteric artery. We have superior mesenteric lymph node.

    02:10 We have inferior mesenteric artery. We have inferior mesenteric lymph node.

    02:16 And ultimately if we remember the foregut, the midgut and the hindgut are served by these blood vessels. Then the lymph from those organs will go to their respective lymph nodes. So the foregut will pass to the coeliac lymph node.

    02:34 The midgut will pass to the superior mesenteric lymph node.

    02:40 And organs within the hindgut will pass to the inferior mesenteric lymph node.

    02:46 Efferent lymphatic vessels from these nodes form what are known as intestinal lymphatic trunks.

    02:55 And these are sent up the body and ultimately will converge to form the cisterna chyli.

    03:01 This occurs around about L1, L2 level.

    03:05 We also have organs which are retroperitoneal and we have the pelvic organs which are not associated with the peritoneum; they are sub-peritoneum.

    03:15 These still give rise to the lymph and these drain into what are known as right and left lumbar lymphatic trunks.

    03:23 These are the same principle as the intestinal lymphatic trunks except they come from those retroperitoneal organs. They come from the pelvic organs.

    03:34 Ultimately the lumbar lymphatic trunks and the intestinal lymphatic trunks unites to form the cisterna chyli which is this dilation around about L1, L2. Really its quite variable in the individual.

    03:49 It occur around about here receiving the intestinal, receiving the lumbar lymphatic trunks.

    03:59 From the cisterna chyli it then continuous through the diaphragm and it then runs through the thorax as the thoracic duct which opens up into the left subclavian and the internal jugular veins, the junction of those.

    About the Lecture

    The lecture Abdominopelvic Viscera – Lymphatic Drainage of Abdominopelvic Organs by James Pickering, PhD is from the course Pelvis.

    Included Quiz Questions

    1. L1–2
    2. T11–12
    3. T12–L1
    4. L2–3
    5. S1-2
    1. Lumbar
    2. Intestinal
    3. Colic
    4. Diaphragmatic
    5. Aortic

    Author of lecture Abdominopelvic Viscera – Lymphatic Drainage of Abdominopelvic Organs

     James Pickering, PhD

    James Pickering, PhD

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