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.
There are three main ways stem cells can be harvested, these are: 1  from blood â where the stem cells are removed from your blood using a special machine (see below) 2  from bone marrow â where a procedure is carried out to remove a sample of bone marrow from the hip bone (see below) from cord blood â where donated blood from the placenta and umbilical cord of a newborn baby is used as the source of stem cells (find out more from the NHS Cord Blood Bank)