I d the future a podcast about evolution and intelligent design.

What does it take to stay alive?

Hello, I'm your host Eric Anderson, and today we'll listen to the second half of my recent conversation

with Dr. Howard Glixman about the remarkable systems in the human body that help control water and sodium and keep us alive.

Dr. Glixman practices Palite of Medicine and is co-author of the recent book, Your Designed Body.

We previously discussed sodium pumps in your cells and blood pressure

sensors in your brain as well as blood flow detectors in the kidneys that help control

renin and aldosterone. We now rejoin the conversation as Dr. Glixman takes us through additional systems that have to work just right to keep you going.

All right, what else do we need to consider?

You've mentioned two mechanisms, just there anything else?

Well, the third mechanism is in both of these systems, in the first two systems, which is arterial,

and the second one is arteriolo, right?

Both of them are affected by the vascular resistance and also the cardiac output.

So if you think about it, this is just beautiful, is well where can you find in the body where the pressure, the chamber or the vessel pressure

or stretch would be totally just due to the sodium in the water itself.

And this would be basically in a low pressure system where in the venous system, where the cardiac output and the downstream vascular resistance is not effective. It's not working. And, and lo and behold, in the atria, right, atria of the heart, you have a sensor there that puts out a,

in response to that stretch, it puts out a hormone called atrial, naturalitic protein. So the word naturitic, people may be familiar with the

term diuretic. Diuretic is when you try to release

sodium.

sodium.

So just to give you an idea, you know, the main pressure in the in the in the level of the heart when it comes out the blood comes out of the

order is about a hundred millimeters of mercury by the time it gets down to the arterio it's about

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