noun
- a red protein in red blood cells that carries oxygen from the lungs to the body’s tissues
Usage: biology
Examples
- The doctor ordered a blood test to check her hemoglobin levels.
- Low hemoglobin can cause fatigue and weakness.
- Hemoglobin gives blood its red color.
- Iron deficiency can lead to decreased hemoglobin production.
- Normal hemoglobin levels vary between men and women.
- The hemoglobin molecule contains iron at its center.