Erythrocytes
Blood cell systemRed blood cells (erythrocytes) are the most abundant blood cells and carry oxygen from lungs to tissues throughout the body via hemoglobin.
They have a biconcave disc shape that maximizes surface area for gas exchange.
Reference range
Female
Source: lab benchmark
Male
Source: lab benchmark
Reference ranges may vary between labs and assays. Always interpret results with your healthcare provider. · LOINC code: 26453-1
Why this matters
Red blood cell levels provide early warning of potential issues with oxygen delivery and overall blood health. Low counts (anemia) may cause fatigue, weakness, shortness of breath, dizziness, or pale skin as tissues receive less oxygen. High counts (polycythemia) can thicken the blood and increase clot risk, potentially leading to headaches, blurred vision, or ruddy skin. Monitoring these levels helps detect changes early, with lifestyle factors such as adequate intake of iron, vitamin B12, and folate supporting healthy red blood cell levels.
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