FACTBOX: The who, what, where, and why of organ trafficking

(Reuters) - Longer life spans and technological advances have spurred a significant global market for trafficked body parts from living donors, says the World Health Organization (WHO). Demand for organ transplants has risen beyond what can be supplied by traditional organ donations.

Here are some facts about organ trafficking and transplantation.

* WHY?

-- Human-to-human transplantation of cell tissue and organs is recognized as the best and often only treatment for end-state organ failure, such as liver and heart failure.

* WHO?

-- The general flow of organs from live donors is from poor, undeveloped countries to rich, developed ones.

-- The majority of transplanted organs come from live, often unrelated donors, rather than using cadaveric organs. In the United States, the number of renal or kidney transplants from live donors exceeded those from deceased donors for the first time in 2001.

* WHAT?

-- Kidney transplants are by far the most frequently carried out, the WHO says. It estimates there about 65,700 kidney transplants, 21,000 liver transplants and 6,000 heart transplants carried out annually.