Andrew Huberman

This area is extremely important because it's the area where lymph fluid is returned to join up with the blood supply.

Remember that fluid started off in the blood supply.

It got out into the interstitial space.

It could have, but didn't rejoin the blood supply out in the tissues.

The lymphatic vessels grabbed it, maybe way down in your feet, maybe in your liver, maybe in your spleen, maybe in your brain, and now it's got to get back in with the blood.

How does that happen?

Well, you have two ducts, okay?

Two tubes.

Biology, we got so many names for tubes.

You have two ducts.

You have the right lymphatic duct, which is on the right, and you have the left lymphatic duct, which is the thoracic lymphatic duct on the left, okay?

Here's the deal.

If you were to draw a line right down the middle of your face or so, and out towards your shoulder and below it on the right, maybe a little bit of torso and your right arm, that right side of your face, your right arm, your right shoulder, kind of upper part of your torso on the right-hand side, that's all going to drain to the right side, that right thoracic duct.

and that right thoracic duct is going to take all the lymph fluid and it's going to dump it back into the venous blood supply.

It's literally going to join up with there.

There's not so little actually vascular tube delivering that deoxygenated blood back to the heart and the lymph is going to dump into there, okay?

The rest of your body,

both your left and right feet, left and right legs, the torso, that's everything I didn't describe for the right thoracic duct, left arm, shoulder, all of that, that's all going to drain to the left thoracic duct.

It's actually just called the thoracic duct.

And it's going to join up with the vein of supply there.