Andrew Huberman

And then now we have the venous systems.

We have these little venous capillaries that are also just one cell wall thick and the water, the carbon dioxide, the ammonia, the waste products is going to get reabsorbed there.

It's going to then go from small diameter tubes, the venous capillaries,

up to larger diameter tubes and eventually into the veins that are going to deliver that blood and the waste products and the carbon dioxide back to the heart and lungs to be reoxygenated and then sent back out to the body, okay?

And you may have heard the word pulmonary before.

If you haven't, that's okay.

The pulmonary system

is the aspect of the circulatory system that is directed towards the lungs to oxygenate the blood.

Okay, so we've got this really nice looped system where oxygenated blood can get out to the tissues of the body.

The cells in those tissues can use the oxygen, the nutrients, et cetera, and the water and the carbon dioxide and ammonia and other waste products that come from just cells doing their business, from them doing all the things that they need to do as a liver cell, as a brain cell, et cetera.

is then going to be passed back into the circulatory system and then back to the heart and lungs so that the waste products can be expelled.

For instance, when you exhale, the carbon dioxide is expelled from your body.

And when you inhale, you bring in more oxygen that then gets on hemoglobin and then back through the arterial system and so on and so forth.

Okay.

So it's a beautiful system.

And even if you only captured five to 10% of what I just said, you certainly will have in mind now that you're

circulatory system for your blood is sending out oxygenated stuff, returning non-oxygenated stuff that also has a lot of waste product in it, and that there's a lot of water in that whole business.

This is all liquid and proteins and glucose, et cetera, but there's a lot of water in this whole thing.

After all, your blood is liquid.

So the important thing to understand about the lymphatic system is that the lymphatic system is there