_
In human lungs the oxygen poor venous blood flows in capillaries in close vicinity to the air bearing oxygen. So CO2 diffuses out of blood while oxygen enters it, binfds to hemoglobin and the venous blood turns into arterial blood.
Welcome to this educational aid for teachers and students of biology or medicine!
It contains drawings, images and virtual reality worlds enhancing the understanding of biological structures.
You need java running on yor computer in order to see the virtual reality worlds.
_
_
_