URL of this page: //www.nlm.nih.gov/medlineplus/ency/imagepages/19510.htm

Hemoglobin

Hemoglobin

Overview

Hemoglobin is the most important component of red blood cells. It is composed of a protein called heme, which binds oxygen. In the lungs, oxygen is exchanged for carbon dioxide.

Abnormalities of an individual's hemoglobin value can indicate defects in the normal balance between red blood cell production and destruction. Both low and high values can indicate disease states.

Update Date 2/25/2014