Answer:
the main site of gas exchange is in the lungs between the alveoli and a family of really small blood vessels called capillaries. Which are placed in the walls of the alveoli.
Explanation:
Answer: Haiya! Explanation: I am sorry if this is wrong forgive me if it is wrong. I am not going to lie cause I ain’t a liar but I looked at the person above me for the answer..... I am sorry!
By slowly introducing the changes and not implementing them all at once.
