Question

what could be the consequence s of deficiency of haemoglobin in our body

Answer 1

in respiration Haemoglobin helps in the transportation of oxygen to the body cells. in case of deficiency of Haemoglobin in blood its oxygen carrying capacity decrease resulting into a deficiency of oxygen in our body cells.because of this the person suffers from breathlessness an indication of anaemia
the average Hb content of blood is 14.5 GM per 100 ml

Answer 2

Due to the deficiency of haemoglobin in blood, its oxygen carrying capacity decreases . As a result the production of energy by oxidation will become slower . One would fall sick and would feel fatigue most of the time .