An older medical term for hemoglobin, the iron-containing protein in red blood cells that carries oxygen throughout your body.
From Greek haima (blood) + Latin globulus (small ball or sphere). This term preceded the modern term 'hemoglobin' when scientists first identified and named oxygen-carrying proteins in blood.
Before modern biochemistry standardized terminology, scientists called the same molecule 'hematoglobulin,' 'hemoglobin,' and other names—this shows how scientific language evolves as understanding improves and consensus develops.
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