comptete the paragraph by choosing he appropriate words given in the bracket :
(degenerated, red bone marrow, adipose connective tissue, blastocyst, umbilical cord, Differentiation)
...... Of stem cells form can form various issues in the body. Stem cells are present in the .......... by which the foetus is joined to the uterus of the mother. Stem cells are also present in the ........ Stage of embryonic development. Stem cells are present in............and............ of adult human beings. It has become possible to produce different types of tissues and the ............ part of any organ with the help of these stem cells.