Transport of oxygen and carbon dioxide

Need to know

What you need to know

• The S-shaped curve demonstrates cooperative binding of oxygen to haemoglobin.
• High pO₂ in the lungs (13.3 kPa) results in high haemoglobin saturation.
• Low pO₂ in the tissues (e.g., 5.3 kPa) causes significant oxygen release.
• The steep part of the curve ensures efficient oxygen unloading to active tissues.

Explanation

Transport of oxygen and carbon dioxide

1. The S-shaped curve demonstrates cooperative binding of oxygen to haemoglobin.
2. High pO₂ in the lungs (13.3 kPa) results in high haemoglobin saturation.
3. Low pO₂ in the tissues (e.g., 5.3 kPa) causes significant oxygen release.
4. The steep part of the curve ensures efficient oxygen unloading to active tissues.