Question

explain the consequences of deficiency of hemoglobin in our bodies

Answer 1

The cells in your body will not get enough oxygen. Symptoms of anemia -- like fatigue -- occur because organs aren't getting what they need to function 

Answer 2

Haemoglobin is present in our blood. It also called the respiratory pigment. It is responsible for the transportation of oxygen throughout our body.

Deficiency of haemoglobin may cause following problems:-
1) Anemia
2) lack of transportation of oxygen in the body which may cause almost every organ of the body to not work properly as every organ needs oxygen.