what is the difference between carboxyhaemoglobin and oxyhaemoglobin?
Carboxyhaemoglobin refers to the haemoglobin which is combined with carbon monoxide instead of oxygen. Carbon monoxide has stronger bonding with haemoglobin than oxygen which makes it a stable compound leading to oxygen deficiency in the body. For example tobacoo smoke increases the level of carbon monoxide in the body leading to an increase in carboxyhaemoglobin.
Oxyhaemoglobin refers to the haemoglobin which is combined with oxygen from the lungs. Oxygen in the body is transported in the form of oxyhaemoglobin. This is the normal form of haemoglobin existing in the body.