There are 4 names in this directory beginning with the letter P.
Packed red blood cells
Packed red blood cells, also known as PRBCs or simply "packed cells", are red blood cells that have been separated for blood transfusion. Packed red blood cells are typically given in situations where the patient has either lost a large amount of blood or has anemia that is causing notable symptoms.
The placenta is a temporary organ that develops in your uterus during pregnancy. This structure provides oxygen and nutrients to your growing baby and removes waste products from your baby's blood. The placenta is a source of hematopoietic stem cells during fetal development.
Pluripotent stem cells
Pluripotent stem cells - are cells that have the capacity to self-renew by dividing and to develop into the three primary germ cell layers of the early embryo and therefore into all cells of the adult body, but not extra-embryonic tissues such as the placenta. Embryonic stem cells and induced pluripotent stem cells are pluripotent stem cells.