Trying to understand this.
When you inspire, diaphragm goes down, this increases the volume of the intrapleural space, decreasing pressure. This causes the lungs which sit inside to expand as (lung pressure > intrapleural space pressure).
Lung expands bringing in more fresh air into the cappillaries and then gas exchange occurs via diffusion.
So during this entire time does the air in the lungs external to the alveoli (cause there is empty space surrounding the alveoli which increases or decreases in volume) stay the same composition wise?
Or is there no empty space external to the alveoli and its tissue that expands itself?
When you inspire, diaphragm goes down, this increases the volume of the intrapleural space, decreasing pressure. This causes the lungs which sit inside to expand as (lung pressure > intrapleural space pressure).
Lung expands bringing in more fresh air into the cappillaries and then gas exchange occurs via diffusion.
So during this entire time does the air in the lungs external to the alveoli (cause there is empty space surrounding the alveoli which increases or decreases in volume) stay the same composition wise?
Or is there no empty space external to the alveoli and its tissue that expands itself?
