Answer:
they give the lungs a really big surface area. they have moist, thin walls (just one cell thick) they have a lot of tiny blood vessels called capillaries.
The walls of the alveoli are only one cell thick. This makes the exchange surface very thin - shortening the diffusion distance across which gases have to move. Each alveolus is surrounded by blood capillaries which ensure a good blood supply.Adaptations of the alveoli:
Thin walls - alveolar walls are one cell thick providing gases with a short diffusion distance. Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface. Permeable walls - allow gases to pass through.
Explanation:
Have great day
Answer:
BY THE WAY IN MATERIALS ARE USED
IN IT'S TIME OF CONVINIANCE
Butterfly's wings the left and right are reflections of each other. However, each butterfly is unique like a Zebra.
Answer:
the correct answer is D
Explanation:
Bacteria have cell walls with peptidoglycan and the Archaea do not; the Archaea live in extreme, atypical environments.
Both biochemical evidence and environmental studies separated the monera into two domains and kingdoms. Both discoveries were the result of new technologies. I hope this helps!!! :)
