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Related Concept Videos

Overview of Hematopoiesis01:20

Overview of Hematopoiesis

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...
Hematopoiesis01:21

Hematopoiesis

The process of blood cell formation is called hematopoiesis. Hematopoiesis starts early during development, on the seventh day of embryogenesis. This phase of hematopoiesis is called the primitive wave, wherein the extraembryonic yolk sac allows the production of erythroid cells and endothelial cells from a common precursor called hemangioblast. The erythroid cells provide oxygen to support the growth of the rapidly dividing embryo. Hemangioblasts later develop into hematopoietic stem cells or...
Erythropoiesis01:14

Erythropoiesis

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, and...
Erythropoiesis01:14

Erythropoiesis

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, and...
Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
Multipotency of Hematopoietic Stem Cells01:19

Multipotency of Hematopoietic Stem Cells

The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...

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Related Experiment Video

Updated: May 16, 2026

Directed Differentiation of Primitive and Definitive Hematopoietic Progenitors from Human Pluripotent Stem Cells
14:37

Directed Differentiation of Primitive and Definitive Hematopoietic Progenitors from Human Pluripotent Stem Cells

Published on: November 1, 2017

Hematopoiesis.

Michael A Rieger1, Timm Schroeder

  • 1Georg-Speyer-Haus, Institute for Biomedical Research, Frankfurt (Main), Germany.

Cold Spring Harbor Perspectives in Biology
|December 5, 2012
PubMed
Summary
This summary is machine-generated.

Hematopoiesis, the process of blood cell regeneration from hematopoietic stem cells, is a classical model for stem cell biology. Ongoing research continues to explore its embryonic development, lifelong maintenance, and the molecular mechanisms governing cell fates.

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Phenotypic Analysis and Isolation of Murine Hematopoietic Stem Cells and Lineage-committed Progenitors
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Phenotypic Analysis and Isolation of Murine Hematopoietic Stem Cells and Lineage-committed Progenitors

Published on: July 8, 2012

Area of Science:

  • Hematology
  • Stem Cell Biology
  • Developmental Biology

Background:

  • Hematopoiesis is the continuous regeneration of adult blood cells from hematopoietic stem cells (HSCs).
  • The hematopoietic system serves as a classical mammalian stem cell model due to its accessibility and established assays.
  • Despite its classical status, many aspects of hematopoiesis remain incompletely understood.

Purpose of the Study:

  • To review the embryonic development and lifelong maintenance of the hematopoietic system.
  • To discuss the cellular components of hematopoiesis.
  • To explore hypotheses on molecular mechanisms controlling hematopoietic cell fates.

Main Methods:

  • Literature review and synthesis of existing research on hematopoiesis.
  • Discussion of established concepts and ongoing disputes in the field.
  • Exploration of developmental and molecular aspects of hematopoietic regulation.

Main Results:

  • Hematopoiesis is a fundamental process for lifelong blood cell production.
  • The hematopoietic system provides a robust model for defining stem cell biology principles.
  • Current understanding of molecular control over hematopoietic cell fate decisions is still evolving.

Conclusions:

  • Hematopoiesis is a critical system for understanding stem cell biology and development.
  • Further research is needed to resolve long-standing questions regarding molecular mechanisms in hematopoiesis.
  • The hematopoietic system continues to be a vital area for both basic science and clinical applications.