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Disorders of Erythrocytes01:27

Disorders of Erythrocytes

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Disorders of erythrocytes, or red blood cells (RBCs), include a range of conditions affecting their number, shape, or function.
Erythrocyte disorders can be broadly categorized into two main types: anemic and polycythemic conditions.
A low oxygen-carrying capacity of the blood due to the loss, lower production, or destruction of erythrocytes is termed anemia. Hemorrhagic anemia, for example, occurs when bleeding from an external wound or internal ulcer reduces erythrocyte counts.
On the other...
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Erythropoiesis01:14

Erythropoiesis

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Red blood cells  (RBCs) transport oxygen to all body tissues. These cells survive only for 120 days and then need to be replenished. Erythropoiesis is the process of RBC production. In healthy individuals, erythropoiesis ensures all tissues are amply supplied with oxygen. In addition, blood loss due to injury leads to a drop in the physiological oxygen level that will cause erythropoiesis. Any defect in erythropoiesis leads to several physiological disorders, including thalassemia, anemia,...
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Lifecycle of Erythrocytes01:22

Lifecycle of Erythrocytes

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Erythrocytes, also known as red blood cells, constantly move through blood capillaries. As a result, they damage their plasma membrane due to the continuous friction. Typically, after 100 to 120 days, erythrocytes become rigid and fragile as they wear out. As they pass through small vessels in the spleen and liver, they can get trapped and break apart into fragments.
The resident phagocytic macrophages deal with these damaged cells by engulfing them and separating their globin and heme groups....
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Factors Affecting Erythropoiesis01:24

Factors Affecting Erythropoiesis

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The cardiovascular system regulates the number of erythrocytes in the bloodstream to ensure optimal oxygen transport. It also prevents over-proliferation of these cells, which helps to maintain blood viscosity and flow rate.
Several factors influence the erythrocyte production rate, with tissue oxygen level being among the most critical. Intense exercise or high altitudes can cause tissue hypoxia, which triggers the kidneys to release more erythropoietin (EPO) into the bloodstream.
EPO then...
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Overview of Hematopoiesis01:20

Overview of Hematopoiesis

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Hematopoiesis, or blood cell production, is a vital biological process that begins early in embryonic development and continues throughout life. This process generates the various types of cells found in blood, including red blood cells, white blood cells, and platelets from hematopoietic stem cells (HSCs).
Developmental Phases of Hematopoiesis
Initially, HSCs are formed in the embryonic yolk sac, a critical site for early blood cell production. These stem cells subsequently migrate to other...
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Structure and Function of Erythrocytes01:29

Structure and Function of Erythrocytes

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There are between 4.2 and 6 million erythrocytes, also known as red blood cells, in every microliter of blood. These cells are small, flattened biconcave discs with centers that are depressed.
The erythrocyte plasma membrane is associated with proteins such as spectrin, which forms a flexible cytoplasmic meshwork. This meshwork allows erythrocytes to twist, turn, become cup-shaped, and regain their biconcave shape as they pass through narrow capillaries. Additionally, erythrocytes can form...
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Immunostaining-Based Detection of Dynamic Alterations in Red Blood Cell Proteins
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Immunostaining-Based Detection of Dynamic Alterations in Red Blood Cell Proteins

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Red Blood Cells in Health and Disease.

Aradhya Giri1, Sandhya Tamgadge1

  • 1Department of Oral and Maxillofacial Pathology and Microbiology, Dr. D. Y. Patil Dental College and Hospital, Navi Mumbai, Maharashtra, India.

Journal of Microscopy and Ultrastructure
|October 8, 2025
PubMed
Summary

Red blood cells (RBCs) are vital for oxygen transport. Abnormalities in RBCs are linked to anemia, cancer, cardiovascular disease, and even COVID-19, highlighting their critical role in health and disease.

Keywords:
Anemiadentistsdiseasediseaseshealthred blood cells

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Area of Science:

  • Hematology
  • Cell Biology
  • Pathophysiology

Background:

  • Red blood cells (RBCs) are essential for oxygen and carbon dioxide transport.
  • RBC abnormalities are implicated in anemia, hemolytic disorders, cancer, and cardiovascular diseases.
  • Recent research underscores the role of RBCs in disease pathology, including COVID-19.

Purpose of the Study:

  • To provide a comprehensive overview of red blood cells in health and disease.
  • To summarize recent advances in RBC research, diagnosis, and treatment.
  • To elucidate the multifaceted role of RBCs in various disease pathologies.

Main Methods:

  • Literature review of current research on red blood cells.
  • Synthesis of findings on RBC structure, function, and pathophysiology.
  • Analysis of the impact of diseases, including COVID-19, on RBCs.

Main Results:

  • Advances in understanding RBC structure and function.
  • Identification of RBC involvement in diverse diseases beyond anemia.
  • Emerging evidence of direct viral impact on RBCs, as seen in COVID-19.

Conclusions:

  • Red blood cells are critical players in overall health and disease.
  • Understanding RBC pathophysiology is key for diagnosing and treating various conditions.
  • Continued research into RBCs offers potential for novel therapeutic strategies.