Questions

Cards (5)

What is the type of epithelium in the alveoli walls
Squamous
what do the elastic fibres in the alveoli do
They prevent the alveoli from bursting and allow them to recoil and return to original size
How does refreshing air in the air sacs help maintain a diffusion gradient
It increase the concentration of oxygen in the air sacs, so the concentration of oxygen is higher than in the blood so diffusion can occur
What is the function of squamous epithelium 
Provide a short diffusion distance
What is the function of ciliated epithelium
To waft mucus