Platelet microanatomy

The following zones are recognised: s

Peripheral zone

Exterior coat or glycocalyx Unit plasma membrane System of filaments Open canalicular system

Sol-gel zone

Submembrane fibres Dense tubular system Microtubules Microfilaments

Organelle zone

Mitochondria Lysosomes Peroxisomes Alpha-granules Dense bodies

Membrane zone

Surface-connected open canalicular system Dense tubular system The contractile apparatus of the platelet is responsible for filopodium and lamelli-podium formation, secretion and clot retraction.

The circulating blood level ranges from 150 000-400 000/ About 2/3rds of the platelet mass circulates in the plasma and the other 1/3rd is sequestered within the spleen. The circulating platelet is inactive. Under normal circumstances it does not interact with other cells during its normal survival of 9-10 days. The turnover rate is around 10% per day.

Normal platelet function comprises adherence and aggregation, release of procoagulant factors and provision of phospholipid surface for the assembly of enzyme complexes.

Was this article helpful?

0 0
Tips and Tricks For Boosting Your Metabolism

Tips and Tricks For Boosting Your Metabolism

So maybe instead of being a pencil-neck dweeb, youre a bit of a fatty. Well, thats no problem either. Because this bonus will show you exactly how to burn that fat off AS you put on muscle. By boosting your metabolism and working out the way you normally do, you will get rid of all that chub and gain the hard, rippled muscles youve been dreaming of.

Get My Free Ebook

Post a comment