Hemoglobin
Hemoglobin, or haemoglobin (spelling differences) (from the Greek word αἷμα, haîma 'blood' + Latin globus 'ball, sphere' + in) (/ ˌ h iː m ə ˈ ɡ l oʊ b ɪ n, ˈ h ɛ m oʊ ˌ/), abbreviated Hb or Hgb, is the ironcontaining oxygentransport metalloprotein in the red blood cells (erythrocytes) of almost all vertebrates (the exception being the fish family Channichthyidae) as well ...