Hemoglobin is a special protein that is part of our blood. It combines with oxygen molecules that enter the body during respiration, and then, together with the general blood flow, hemoglobin carries oxygen and gives it to organs and tissues. After transporting oxygen, hemoglobin takes carbon dioxide from the tissues and sends it to the lungs. It is worth noting that without hemoglobin, a full-fledged process of inhalation and exhalation would be impossible. How can a low level of hemoglobin ...