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Structure and Function of Platelets01:18

Structure and Function of Platelets

The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
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Updated: Jun 6, 2026

Analyzing Platelet Subpopulations by Multi-color Flow Cytometry
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Published on: June 10, 2025

Platelet precursors display bipolar behavior.

Hansjörg Schwertz1, Andrew S Weyrich

  • 1Program in Molecular Medicine, University of Utah, Salt Lake City, UT 84112, USA.

The Journal of Cell Biology
|November 17, 2010
PubMed
Summary
This summary is machine-generated.

Newly released platelets exhibit bipolar behavior, transitioning between round cells and proplatelets. This intermediate stage, termed preplatelets, offers new insights into terminal platelet maturation.

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Last Updated: Jun 6, 2026

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Procoagulant Platelet Characterization by Measuring Phosphatidylserine Exposure and Microvesicle Release from Human Purified Platelets
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Area of Science:

  • Cell Biology
  • Hematology
  • Biochemistry

Background:

  • Platelets are crucial for hemostasis and thrombosis.
  • Platelet production (thrombopoiesis) involves megakaryocytes.
  • The final stages of platelet maturation remain incompletely understood.

Discussion:

  • Thon et al. reveal that newly released platelets display dynamic bipolar behavior.
  • These cells oscillate between a rounded morphology and the formation of proplatelets.
  • This dynamic behavior defines a novel intermediate stage: the preplatelet.

Key Insights:

  • Platelet release is not a terminal, unidirectional process.
  • The preplatelet stage represents a critical, dynamic intermediate in thrombopoiesis.
  • This finding refines our understanding of the terminal steps of platelet formation.

Outlook:

  • Further research into preplatelet dynamics could reveal new therapeutic targets.
  • Understanding this stage may elucidate mechanisms of platelet-related disorders.
  • Investigating the molecular regulation of preplatelet behavior is warranted.