Sentence:  In september , 1958 , the patient developed generalized weakness and fatigue which was concurrent with exacerbation of his anemia ; the <WSD>hemoglobin</WSD> was 10.6 gm. . 
Meaning of the word marked with <WSD> tags:  a hemoprotein composed of globin and heme that gives red blood cells their characteristic color; function primarily to transport oxygen from the lungs to the body tissues