Embryonic stem cells
After embryonic stem cells are combined with oocytes and sperm to become fertilized eggs, the embryos that start with one cell become blastocytes composed of several cells through cell division. Inside the blastocyst is a mass of cells called myocytes, which undergo cell division and differentiation to form an embryo, and the embryo develops as a single entity through the gestation period. In this process, the cells of the inner cell mass differentiate into cells of all the tissues in the blood, bone, skin, liver and so on. Therefore, the stem cells extracted from the embryonic stage are called pluripotent cells that can develop into organs such as bone, liver, and heart. If embryonic stem cells can transplant endothelial cells used for the treatment of various incurable diseases indefinitely in a test tube, a human race's dream of disease-free survival is realized. It is a necessary skill in the reality that donated organ is lacking. Currently, attempts have been made to cultivate and inject normal cells replacing cells with disorders in patients suffering from leukemia, Parkinson's disease, diabetes, etc. from the outside.