The 2-Minute Rule for 가슴수술
The zygote, which is the cell resulting from the fertilization of an oocyte by a spermatozoon, is totipotent. A number of successive cell divisions make the morula, with 32–64 totipotent cells. Following that phase, it develops into the blastocyst, which consists of a hollow ball of cells. Peripheral cells (the trophoblast) with the blastocyst cr