The mitochondrion produce a substance called adenosine triphosphate. It is also known as ATP. It is believed to be our source of energy. ATP's main purpose is to transport chemical energy within cells for metabolism[2]. Metabolism is the sum of the physical and chemical changes that take place in living organisms.
Stem cell harvest. Stem cells used to be harvested from the bone marrow. That has now largely been abandoned in favour of harveting directly from the peripheral blood.
Stem Cell Therapy. Much of the attention and all of the controversy surrounding stem cell therapy has focused on embryonic stem cells -- cells harvested four to five days after an embryo is fertilized. Adult stem cells exist to replace damaged or aging cells, and they are found in tissue throughout the body of adults and in the blood and bone marrow, where cells are much easier to harvest. Stem cell therapy has been used for many decades to treat leukemia and other cancers, but the treatment-related death rate is high due to the aggressive chemotherapy and/or radiation used to dramatically suppress the immune system and kill cancer cells.