Ultrastructural observations on the platelets of the Arabian tahr (Hemitragus jayakari)

E. H. Johnson, D. E. Muirhead, R. J. Wood, G. J. King, R. Al-Busaidy

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)148-150
Number of pages3
JournalAnatomia, Histologia, Embryologia
Issue number3
Publication statusPublished - 2002

ASJC Scopus subject areas

  • General Veterinary


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