Question

breathing is a)exchange of gas at respiratory surface
b)exchange of gas at tissue level c) bringing oxygen rich fresh air to respiratory surface and taking out CO2 reach your outside d)breaking of respiratory substrate​

Answer 1

Answer:

C)- Bringing oxygen rich fresh air to respiratory surface and talking out CO2.

Hope it will help you.

Answer 2

Answer:

c -> bringing oxygen-rich fresh air to respiratory surface and taking out CO2 reach your outside