Red blood cells carry oxygen from the lungs to the tissues and carbon dioxide back. Contain hemoglobin and are responsible for gas exchange.
- Men: 4.5-5.5 × 10¹²/l
- Women: 3.8-4.8 × 10¹²/
dehydration, chronic hypoxia, lung diseases, congenital heart defects, erythremia.
anemia, blood loss, chronic inflammatory diseases, bone marrow hematopoiesis disorders.



