Red Blood Cell Lifespan and Breakdown
Red blood cells typically have a lifespan of around 100 to 120 days. During this time, they undergo changes that enable macrophages in the bone marrow, liver, and spleen to eliminate them from circulation. The body then proceeds to break down these red blood cells and recycle their various components.
One component that undergoes breakdown is globin, the protein part of hemoglobin. It breaks down into amino acids, which can be utilized by the bone marrow for the production of new erythrocytes. Iron, on the other hand, is stored in either the liver or spleen, but it can also be sent to the bone marrow to support erythropoiesis.
The non-iron portions of red blood cells degrade further into biliverdin and then bilirubin. The liver plays a crucial role in converting bilirubin into bile, a substance necessary for digestion and the absorption of fats.
Understanding the Impact of Abnormal Red Blood Cell Counts
Various medical conditions and diseases have the potential to disrupt the normal red blood cell count in the body, leading to adverse effects. When the number of red blood cells is below the standard range, it can result in fatigue, dizziness, weakness, headaches, shortness of breath, and pale skin. Conversely, an elevated red blood cell count can also yield similar problems, along with joint pain, itching skin, and tenderness. To identify the underlying cause of abnormal red blood cell counts, healthcare professionals may need to conduct further diagnostic tests.