At about 3 |im, thrombocytes are the smallest of the blood cells. They are created as the megakaryocyte disintegrates (see Fig.309e). Thrombocytes do not have a nucleus. In streaming blood, thrombocytes have the shape of biconcave disks. In vascular endothelium, they attach to damaged structures and in this way seal the vessels. In the process, thrombocytes are activated, change their shape and release secretory products [2, [3. One important sign of this activation is the formation of pseudopodia. The secretory products not only stimulate blood clotting, but also the subsequent processes of inflammation and repair. Electron micrographs usually show thrombocytes as spindle-shaped cells in cross-sections.
1 Peripheral bundle of microtubules
3 Serotonin-containing granule (dense body)
Electron microscopy; magnification: x 27 600
Was this article helpful?
This guide will help millions of people understand this condition so that they can take control of their lives and make informed decisions. The ebook covers information on a vast number of different types of neuropathy. In addition, it will be a useful resource for their families, caregivers, and health care providers.