Does it make any difference to have the haemoglobin in the corpuscles

Does it make any difference to have the haemoglobin in the corpuscles rather than in plasma ? Explain.

Answer»

There is great difference in respects of efficiency of carrying the oxygen from respiratory organs to the body tissue as follows :

S. No.	Haemoglobin in corpuscles	Haemoglobin in plasma
(i)	As RBC are small, rounded and in more in quantity, so haemoglobin is exposed with large combined surface area to absorb O₂.	In plasma, the exposed surface area for haemoglobin is very limited in comparison to the RBC, the result is the absorption of O₂ in less amount.
(ii)	When RBC pass through the small capillaries of respiratory organs, one by one, they have ample time and surface, to absorb oxygen.	The haemoglobin dissolved in plasma has lesser time as it pass quickly, (being liquid) through the box of capillaries.