Hemoglobin - Wikipedia
https://en.wikipedia.org/wiki/HemoglobinHemoglobin or haemoglobin (spelling differences) (from the Greek word αἷμα, haîma 'blood' + Latin globus 'ball, sphere' + -in) (/ˌhiːməˈɡloʊbɪn, ˈhɛmoʊˌ-/ ), abbreviated Hb or Hgb, is the iron-containing oxygen-transport metalloprotein in the red blood cells (erythrocytes) of almost all vertebrates (the exception being the fish family Channichthyidae ) as well as the tissues of some invertebrates. …
Hemoglobin Definition & Meaning - Merriam-Webster
www.merriam-webster.com › dictionary › hemoglobinThe meaning of HEMOGLOBIN is an iron-containing respiratory pigment of vertebrate red blood cells that consists of a globin composed of four subunits each of which is linked to a heme molecule, that functions in oxygen transport to the tissues after conversion to oxygenated form in the gills or lungs, and that assists in carbon dioxide transport back to the gills or lungs after surrender of ...