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Jane 333's avatar

The airway mucosa must condition the incoming air with salt and moisture

100% humidity at the alveoli

The surfactant produced at the alveoli makes bubbles

The bubbles burst upon the alveoli sac capillaries - spraying saline water upon the passing RBCs - the blood cells hydrate

The state changes of the RBCs is from dehydration to hydration- contracted to expanded - dense/dark to bright

The red light monitoring is recording hydration by measuring the light from the RBCs nothing to do with oxygen

There’s more, my article takes you through step by step

It’s a paradigm shift in understanding lung physiology

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