O a platelets? O le a latou matafaioi i le tino? Lea faamai platelets faateleina

laiti lē faaniukilia Platelets faia elemene o le toto. ua aafia i latou i hemostasis (a faigata o le tali e faatatau i le taofia toto ma lapataiga). Platelets e faataamilo po o faʻafua i foliga. O le lautele o le sela o le va o le lua ma le fa microns.

I ipu toto, platelets ua faatulagaina i le puipui po o le bloodstream. I le tulaga lona lua, o le sela i ai i se malolo setete ma ua i ai se foliga tisiki. sao faatoagaina mai platelet i le suia oo latou ituaiga: o le sela avea sphericity ma protuberances ituaiga faapitoa (pseudopodia). E ala i nei faiga ua mafai ona o le toto elemene gauai atu i isi po o le tasi i le pa o le faaleagaina vaa ua. Lenei aafiaga matautia ua taʻua aggregation (pipii faatasi). Platelets le gata i lea, umia meatotino i le adhesion (tuufaatasiga), degranulation (faamatuu atu o mataupu), retraction clot (po o le vavaeeseina atoatoa o clot toto faaitiitia mai serum). I luga o le fogaeleele, e mafai e le sela, e talia fibrinogen, biologically toaga se mea (serotonin), anticoagulants, ma complexes sao (o lo o faasalalauina).

E adhesion ma aggregation platelet maua hemostasis i vaa laiti-caliber (sela faaputuputu i le nofoaga o le faaleagaina). A o fualaau oona faagasologa coalescence e adrenaline, thrombin, collagen, serotonin. Faatasi ai ma le auai o tagata o thrombin o le faagasologa faavaega (pseudopodia). Platelet pellets aofia ai vala clotting (serotonin, peroxidase enzyme platelet fibrinogen, adenosine diphosphate (ADP), serotonin, vaega tuputupu ae maua-platelet, von vala Willebrand).

I le taimi o retraction o le toto clot tupu adhesion e fibrin filaments ma faamalolo trombostenina lea ua foia i latou. Le taunuuga o se faamaufaailoga ma twisting le filo, ua faapea ona fausia ai a thrombus autu.

Iloiloga o platelets toto e fuafua le faataamilosaga coagulation. Manatu se faasalaga masani o le 180-320 afe i le milliliter.

Afai ua faateleina platelets, ona leai lea o thrombocytosis. O a tulaga e mafai ona faailoa mai se maʻi faaumiumi o se natura pipisi, tumors, faamai toto. e mafai ona mafua Thrombocytosis faavaega o clots toto i le ipu. Afai e faateleina platelets, e mafai e mamago le tino. O a tulaga e mafai ona amataina e faasuati, intake suāvai atoatoa, faaletonu nofoa.

e mafai ona suia le faasalaga o platelets i le toto e faalagolago i le taimi o le tausaga po o le aso. Le tuuina i lalo e mafai ona matauina mataupu feaveai i le vaitaimi palapala masina po o le maitaga. E masani lava platelets faateleina ina ua uma ona faamalosi tino.

e mafai ona tupu Thrombocytosis e le gata i tagata matutua ma tamaiti. Faateleina le faasalaga platelet mafai ona avea ma autu po o le lona lua.

thrombocytosis faavaeina fanau ina ua mavae aveeseina o abnormalities congenital.

Le taimi muamua faateleina platelets, e masani lava i eritremii, leukemia myeloid faaumiumi ma isi faamai toto. Faateleina o le faasalaga o le toto sela o loo fesootai ma le saoasaoa o le vaega o le vailaau (megakaryocytes). O lenei faagasologa o le uiga o le suiga matuia.

thrombocytosis Maualuga iloa mai i faamai e tulai mai e ala i le faateleina o le tuuina atu o thrombopoietin (hormone polypeptide).

mafai ona faateleina Platelets i colitis ulcerative, fatafata vaivai chronic, manuʻa rheumatoid articular uiga mamapala extrapulmonary, amyloidosis, osteomyelitis, ate cirrhosis ma isi pathologies inflammatory faaumiumi. Thrombocytosis tupu i le talaaga o le atinae o tumors matuia, hemorrhages, ina ua faaletonu nisi fanau mai.