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<p> There are three types of haemoglobin: embryonic, foetal and adult. Embryonic is present in the early stages of foetal development. Foetal haemoglobin has a higher affinity for oxygen than adult haemoglobin and is replaced by adult haemoglobin shortly after birth. Dogs do not have foetal or embryonic haemoglobin. Horses do not have embryonic haemoglobin and their foetal haemoglobin is structurally identical to adult haemoglobin and as such some would say that there is no foetal haemoglobin. Pig (and horse) foetal haemoglobin has the same affinity for oxygen as their adult haemoglobin.</p>
 
<p> There are three types of haemoglobin: embryonic, foetal and adult. Embryonic is present in the early stages of foetal development. Foetal haemoglobin has a higher affinity for oxygen than adult haemoglobin and is replaced by adult haemoglobin shortly after birth. Dogs do not have foetal or embryonic haemoglobin. Horses do not have embryonic haemoglobin and their foetal haemoglobin is structurally identical to adult haemoglobin and as such some would say that there is no foetal haemoglobin. Pig (and horse) foetal haemoglobin has the same affinity for oxygen as their adult haemoglobin.</p>
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====Figures====
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====Chemistry====
 
<p>
 
<p>
 
*One gram of haemoglobin binds 1.34g of oxygen.
 
*One gram of haemoglobin binds 1.34g of oxygen.
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