Platelets.Platelet is a minute, irregularly shaped, disklike cytoplasmic body found in blood plasma that promotes blood clotting and has no definite nucleus, no DNA, and no hemoglobin.

• 血小板：血小板为血浆中一小形、不规则形、盘状细胞质，可促进血液凝固，无细胞核，无DNA，也不含血红素。