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
Okay so i have to type 20 characters........answer is B
No diagram shown, but it would be the fish/any other organisms near or in the shallow part/any part of a pond/lake.
Answer:
1. to get into certain types of iphones
2. at Disney world they have you scan your finger to get into the park
Explanation:
genes control traits so when a gene is changed the trait changes
A
