Question

The transition between the respiratory system and the circulatory system occurs when oxygen transfers from _____ to _____.


A.
bronchi, trachea


B.
capillaries, veins


C.
bronchi, capillaries


D.
alveoli, capillaries

Answer 1

Answer:

alveoli, capillaries

Explanation:

alveoli is respiratory, capillaries is circulatory

Answer 2

Answer:

C

Explanation:

The air enters the Bronchioles and then the alveoli from where they come in contact with blood from the capillaries where the CO2 diffuses out and O2 diffuses in. The blood is then sent to the heart which pumps it all over the body(basically circulatory system.)

If you require a detailed explanation ask in comments