1. Platelets, also called thrombocytes (from Greek ???????, 'clot' and ?????, 'cell'), are a component of blood whose function (along with the coagulation factors) is to react to bleeding from blood vessel injury by clumping, thereby initiating a blood clot.[1] Platelets have no cell nucleus; they are fragments of cytoplasm that are derived from the megakaryocytes[2] of the bone marrow, which then enter the circulation. Circulating inactivated platelets are biconvex discoid (lens-shaped) structures,[3][4]: 117?18 2?3 µm in greatest diameter.[5] Activated platelets have cell membrane projections covering their surface. Platelets are found only in mammals, whereas in other vertebrates (e.g. birds, amphibians), thrombocytes circulate as intact mononuclear cells.[4]: 3
2. thrombocytes : Cellules sanguines responsables de la coagulation, également connues sous le nom de plaquettes. Elles jouent un rôle essentiel dans la prévention des hémorragies en s'agrégeant pour former des caillots.
Les thrombocytes se regroupent rapidement sur une plaie pour stopper le saignement.
Un taux de thrombocytes anormal peut indiquer des problèmes de santé sous-jacents.
Les médecins surveillent souvent le nombre de thrombocytes lors des analyses sanguines.
