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Ultrastructural Observations on the Platelets of the Arabian Tahr ( Hemitragus jayakari )
Author(s) -
Johnson E. H.,
Muirhead D. E.,
Wood R. J.,
King G. J.,
AlBusaidy R.
Publication year - 2002
Publication title -
anatomia, histologia, embryologia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.34
H-Index - 35
eISSN - 1439-0264
pISSN - 0340-2096
DOI - 10.1046/j.1439-0264.2002.00379.x
Subject(s) - platelet , ultrastructure , nucleoid , biology , electron microscope , vesicle , pathology , microbiology and biotechnology , anatomy , immunology , genetics , medicine , gene , physics , escherichia coli , membrane , optics
Summary The ultrastructure of platelets was studied in specimens of peripheral blood from 18 healthy adult Arabian tahrs ( Hemitragus jayakari ). The platelets were characterized by their extreme polymorphism. The number of alpha granules, typically one to six per cell, was considerably less than that reported for most animal platelets. Similar to humans, the platelets of the Arabian tahr had nucleoids within the alpha granules. However, nucleoids were not a consistent finding. One or more electron‐dense granules, most commonly contained within clear vesicles, was commonly observed. A unique feature was the lack of an open canalicular system, which is considered a hallmark feature of this cell type in most mammalian and reptilian platelets.