As used in this subchapter:
(1) “Amniotic fluid” means the fluid inside the amnion;
(2) “Nonembryonic stem cell research” means medical research involving stem cells that have not been derived from a human embryo or fetus;
(3) “Placenta” means the organ that forms on the inner wall of the human uterus during pregnancy;
(4) “Postnatal tissue and fluid” means the placenta, umbilical cord, and amniotic fluid expelled or extracted in connection with the birth of a human being;
(5) “Stem cell” means an unspecialized or undifferentiated cell that can self-replicate and has the potential to differentiate into a specialized cell type; and
(6) “Umbilical cord” means the gelatinous tissue and blood vessels connecting an unborn human being to the placenta.