这种细胞被发现存在于初成形的胚胎中，但它很快发生变化，转变成各种类型的细胞，诸如肌肉细胞、神经细胞、皮肤细胞或血细胞。
These cells are found in days-old embryos, but quickly differentiate -- becoming the various cell types from muscle to nerve to skin or blood.
血栓是由纤维蛋白和血细胞组成的，可发生于心血管系统的多个部位，包括静脉、动脉、心脏和微循环。
Thrombi are composed of fibrin and blood cells and may form in any part of the cardiovascular system, including veins, arteries, the heart, and the microcirculation.
兴国红鲤血细胞发生的主要器官是头肾、体肾、脾和胸腺。
In this paper, the genesis of blood cells in Xingguo red carp Cyprinus carpio var.
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