Hemoglobin
/hˌiməˈɡloʊbən/
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Definition
(noun) The iron-containing substance in red blood cells that transports oxygen from the lungs to the rest of the body; it consists of a protein (globulin), and haem (a porphyrin ring with an atom of iron at its centre).
Sentence Examples
The tests confirmed that she has low blood pressure and low hemoglobin.
CEFR Practice Quiz
The main function of ____ is to transport oxygen from the lungs to the rest of the body's tissues.