Explain the transportation of oxygen and carbon dioxide in the blood.

Oxygen is transported in the blood by (RBC). It binds with a substance in red blood cells called haemoglobin. Haemoglobin is made up of iron and simple proteins.
When oxygen and haemoglobin bind it is called oxyhaemoglobin. When the red blood cells reach cells in the body where oxygen is needed the process of binding is reversed and the oxygen diffuses into the cells once again leaving haemoglobin in the (RBC).
The waste product from the cells is called carbon dioxide. This diffuses into the (RBC) and it makes carbonic acid by combining with the water. This process is made faster by an enzyme called 'carbonic hydrase'

Ref:-www.miracleofthebloodandheart.com/4_dif_image006_0000.jpg

Edited by Parsons.R,Undated,GCSE Double Science Biology The Revision Guide Higher Level,Newcastle upon Tyne,Coordination Group Publications LTD.

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