He aha e platelets? He aha te mea ratou tūranga i roto i te tinana? I nui haere mate platelets

Platelets e iti kore-karihi āhuatanga i hanga o toto. E whai wāhi ana ratou i roto i te hemostasis (te matatini o ngā tauhohenga e hāngai ana ki tu toto, me te whakatūpato). He tawhio porotītaha ranei i roto i te āhua platelets. Ko te diameter o te pūtau kei waenganui i rua me wha microns.

I roto i te oko toto, kua whakaritea platelets i te taiepa ranei i roto i te bloodstream. I roto i te take tuarua, ko nga pūtau i roto i te āhua noho a kua he āhua kōpae. whai wāhi whakahohenga mōtepe ki te huri o ratou puka: te pūtau hei sphericity me protuberances puka motuhake (pseudopodia). Na roto o enei tukanga e nehenehe o huānga toto piri ki tetahi ki tetahi ranei ki te taiepa o te oko he kino. huaina ana tēnei āhuatanga ko te whakawhāititanga (pipiki tahi). Platelets, ano, riro āhuatanga ki te adhesion (piringa), degranulation (tuku o tirotiro), retraction katinga (ranei oti wehenga o katinga toto heke i serum). I tona mata, e taea ki te aro ki pūtaitoto, kaha biologically he taonga (serotonin), anticoagulants, me complexes ārai (komuhumuhu) te pūtau.

Na roto i te adhesion me mōtepe whakawhāititanga whakarato hemostasis i roto i oko iti-ërä (pūtau kohikohi i te pae o te kino). Ka rite ki stimulants tukanga coalescence he Adrenaline, thrombin, collagen, serotonin. Ki te whai wāhitanga o te thrombin ko te tukanga hanganga (pseudopodia). pire mōtepe roto i ngā āhuatanga upoo- (serotonin, peroxidase paru mōtepe pūtaitoto, diphosphate adenosine (ADP), serotonin, take tupu mōtepe-ahu, von Willebrand tauwehe).

I roto i te retraction o katinga toto puta adhesion ki pūtōtepe kakawaea me te tuku trombostenina i mutu ai ki runga ki a ratou. Ko te hua ko te hiri a ka romia e te aho, ko te kupu hanga he thrombus tuatahi.

Tātaritanga o platelets toto ki te whakatau i ngā tawhā coagulation. Whakaaro he kukū tonu o 180-320 mano ia ritamano.

Ki te e nui haere platelets, na reira he thrombocytosis. kia tohu i te huru taua te mate ma'i o te hopuhopu āhua, te pukupuku, mate toto. Ka taea e Thrombocytosis meinga hanganga o clots toto i roto i te oko. Ki te nui haere platelets, he reira taea he dehydrated te tinana. Ka taea te rongo i te huru pērā i ruaki, te horomanga inu takarepa, kumete whakararuraru.

Ko te kukū o platelets i roto i te toto e rerekē i runga i te wa o te tau ranei ra rānei. Tukupu te ihirangi pūtau e taea te kitea i roto i te wā paheketanga hapū ranei. E mea pinepine platelets nui haere i muri i kohakoha tinana.

Ka taea e Thrombocytosis puta i roto i rua ngā pakeke me ngā tamariki. Te whakanui ake i te kukū mōtepe taea e tuatahi tuarua ranei.

thrombocytosis whakapumautia tamariki i muri whakarerenga o abnormalities congenital.

I te tīmatanga nui haere platelets, nuinga i eritremii, ma'i kanisā myeloid me ētahi atu mate toto. Te whakanui ake i te kukū o ngā pūtau toto e pā ana te ki te whakaterenga o wehenga o te kawainga (megakaryocytes). He āhuatanga o te huringa mārere tenei tukanga.

thrombocytosis Tuarua kitea i roto i mate puta i roto i nui haere hanga o thrombopoietin (polypeptide taiki).

Ka taea te nui haere platelets i roto i colitis ulcerative, kohi pūkahukahu, rheumatoid articular huru pāpaka kohi extrapulmonary, amyloidosis, te tapû, ate cirrhosis me ētahi atu pathologies inflammatory ma'i. Puta Thrombocytosis i runga i te whakamārama o te whanaketanga o te pukupuku mārere, pakaruhanga toto, i muri i etahi mea kohakore whanautanga.