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Why body system is dependent on a constant supply of iron, and what deficiency is caused when this mineral is lacking?

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The respiratory system always needs iron. The red blood cells are in charge of the transport of O2. They need iron to do this. 

Hope this helps! :)

Answer:

For erythropoesis/ RBC production, anaemia

Explanation:

Our body needs a constant supply of blood. The blood contains haemoglobin which is a respiratory pigment and a conjugated protein. It contains iron and globin protein. This iron-containing pigment supplies more oxygen to the tissues and gives red colour to the blood. The deficiency of iron or this haemoglobin pigment in the blood leads to anaemia. The iron pigment or haem pigment of haemoglobin increases the carrying capacity of oxygen. Our body tissue needs oxygen for metabolism.We get iron from foods and these irons play an important role in RBC production in the bone marrow.

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