The blood is usually deficient in haemoglobin, which is often only 40-50% of the normal.
The blood is coloured red by haemoglobin in blood corpuscles.
haemoglobin is extracted from the blood of an ox and may be administered in bolus form.
Alcohol prevents the haemoglobin of the blood from doing its office, which is to supply oxygen and remove carbon dioxid.
A further striking characteristic of haemoglobin is that it contains iron in its molecule.
It is very poisonous, uniting with the haemoglobin of the blood to form carbonyl-haemoglobin.
It is proved, however, that the destruction of the haemoglobin is entirely effected there.
Haematoporphyrin and biliverdin also occur in the egg-shells of certain birds, but in this case they are derived from haemoglobin.
In certain forms of anaemia it increases the number of the red corpuscles and also their haemoglobin content.
Like haemoglobin, it acts as an oxygen-carrier in respiration, but it takes no part in surface coloration.