All right, welcome. My name is Devine. This is episode 422 of the Devine Intervention

Podcasts. And today's podcast that will continue in the pulmonary Path of Physiology series,

and this is going to be series 12.

So let's just get right into it. I'm going to try to bring in some stuff I talked about last time,

but I'm also going to go into discussing long zones.

I'm going to go into in long, long zones.

So again, just for the sake of time,

we know that first, ventilation and profusion are greater at the base of the lungs.

Remember the lungs has an, the lungs have an apex.

That's the very top.

That's where Panko's tumors like to hide out.

And then it has a base which is at the bottom closer to the diaphrag. So ventilation and profusion are higher at the base of the lungs. So why is that? Well the thing is

ventilation is greater because your intraural pressures tend to be higher as you go from the top of the

lungs to the bottom. Basically the bottom of the lungs has higher intra plural pressures. If you want to understand

intra plural pressures more, listen to the earlier parts of this Pronary Path of this series.

I just can go back there because that will take a lot of time. But

intra plural pressures are higher at the long beast and at the long apex.

They're basically less negative as you go from the long apex to the long base, right?

So they are higher at the long base compared to the long apex.

So if you think about it, since you have higher intra plural pressures at the base of the lungs,

that means the alveoli at the bottom of the lungs are more collapsed than the alveoli

at the top of the lungs. Maybe a better way to explain it is think of the apex and the base of your lungs as being a

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