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thrombocytesdisc-like components of mammalian BLOOD, consisting of non-nucleated cytoplasmic fragments of large bone-marrow cells 3 μm in diameter called megakaryocytes that have entered the blood circulatory system. Platelets play an important part in BLOOD CLOTTING.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
Fragments of a large precursor cell (a megakaryocyte) found in the bone marrow. These fragments adhere to areas of blood vessel damage and release chemical signals that direct the formation of a blood clot.
Mentioned in: Antituberculosis Drugs, Blood Donation and Registry, Bone Marrow Transplantation, Chemotherapy, Hantavirus Infections, Hemophilia, Platelet Aggregation Test, Platelet Function Disorders, Transient Ischemic Attack, Von Willebrand Disease, Wiskott-Aldrich Syndrome
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.