Stem cells have largely been researched and used in the biomedical world by scientists and researchers. The reason why stem cells have been highly researched and studied is they have a potential to be a cure for diseases. In this paper you will learn the introduction into Stem cell, why was Henrietta Lacks so important to stem cells, and the history of a Stem cell.Embryonic Stem cells come from an embryos that are three to five days old. The stage of an embryo is called a blastocyst they have 150 cells. The cells are called Pluripotent stem cells meaning they can divide into more stem cells or can be any type of cell in the body. In many tissues they serve as a repair system, that divides without limit to replenish as long as the animal, or person is alive. Henrietta Lacks was born on August 1, 1920 she died from cervical cancer on October 4, 1951. When Henrietta was 31 she got cells taken from her body without her consent and they were used to for the HeLa cell line. On january 29, 1951 she went the hospital to diagnose an abnormal pain and bleeding from her abdomen. During her radiation treatments the doctors took two cervical samples (without her consent). Lacks’s tumor cells went to the laboratory of researcher Dr. George Otto Gey. Jonas Salk used the HeLa (Henrietta Lacks cells) strain to develop the polio vaccine, sparking mass interest in the cells. In 1955 scientist had cloned the cells. These stem cells have helped 10,000 of patients in over six contestants.Because stem cells can be found in bone marrow here’s a fun fact. In 1968, the first bone marrow transplant was performed to successfully treat two siblings with severe combined immunodeficiency. In 1978 stem cells were discovered in human blood cord, in 1981 the first vitro stem cell line developed by mice, in 1988 embryonic stem cell line created from hamsters, in 1997 cloned lamb from stem cells. In 1998, Thompson, from the University of Wisconsin, isolated cells from the inner cell mass of early embryos and developed the first embryonic stem cell lines. Adult stem cells are already being used to treat many conditions such as heart disease and leukaemia.