血块这个词的第三个意思是“凝血”。我们发现胚胎在血块阶段的外观和囊袋很像一块凝血。这是因为此阶段有相对大量的血出现在胚胎中。

• The third meaning of the word alaqah is "blood clot." We find that the external appearance of the embryo and its sacs during the alaqah stage is similar to that of a blood clot. This is due to the presence of relatively large amounts of blood present in the embryo during this stage .