Gradual break down of the thin walls of the alveoli decreasing the total surface area of the gaseous exchange is ………..
A. bronchitis
B. emphysema
C. asthma
D. tuberculosis
Answer:B
Gradual break down of the thin walls of the alveoli decreasing the total surface area of the gaseous exchange is ………..
A. bronchitis B. emphysema C. asthma D. tuberculosis