Oxygen in the body
•PIO2- inspired
oxygen- oxygen available in the lungs
•O2 transported in
body by respiratory pigment haemoglobin in
red blood cells
–Lungs oxygenate
blood
–Heart pumps blood
through body
–High pressure of O2 in capillaries
causes diffusion into tissue
•Sea-level- 100 ml of
blood contains 20 ml of O2