- >The exchange of
- O2 & CO2 between the systemic
- capillaries and the body’s cells.
- >oxygenated blood leaves the heart through Left
- ventricle, into aorta and travels to tissue.
- >as it reaches the capillaries, O2 diffuses out of
- capillaries across to tissues.
>CO2 diffuses out of tissues and into capillaries
>Blood returns to heart via vena cava, into Right atrium
>blood is now poor in O2 and rich in CO2