what are the characterstic features of respiratory structures
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thin walls.
a moist inner surface.
a huge combined surface area.
a rich blood supply- each alveolus is sounded by capillaries.
a moist inner surface.
a huge combined surface area.
a rich blood supply- each alveolus is sounded by capillaries.
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::Large coilling of blood capillaries for diffusion
::inner surface is moist
::diaphram contarction and rekaxation that helps in pressure increase and decrease
::inner surface is moist
::diaphram contarction and rekaxation that helps in pressure increase and decrease
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