Question

Discuss the significance of haemoglobin in respiration.

Answer 1

• Haemoglobin, present in R.B.C.s, combines with oxygen in the lungs and is converted into oxyhaemoglobin. This blood is termed pure or oxygenated blood. Haemoglobin is the carrier of oxygen to all the living cells for cellular respiration.
  
• Oxygen present in haemoglobin is used and carbon dioxide released during cellular respiration combines with haemoglobin. This blood is termed impure or deoxygenated blood.
  
• This impure blood is carried to the lungs. Haemoglobin releases carbon dioxide and combines with oxygen and is converted into oxyhaemoglobin again to be carried to all living cells through blood circulation.