Human respiratory gas

1.Contaminated blood

comes to capillaries by

Pulmonary arterys

ystem

2.High concentration of

Oxygen in Alveoli

3.Here,gas exchange occur

by diffusion process where

Oxygen moves from alveoli

to capillaries

4.carbon dioxide moves

from blood vessel to alveoli

due to the concentration

process

Blood become oxygenated

or purified through this

process than transfer From

lungs to heart through

t pulmonary vein