The term cytokine is derived from a combination of two Greek words - cyto meaning cell and kinos meaning movement. Cytokines are cell signalling molecules that aid cell to cell communication in immune responses and stimulate the movement of cells towards sites of inflammation, infection and trauma.
Organs that have been successfully transplanted include the heart, kidneys, liver, lungs, pancreas, intestine, and thymus. Some organs, like the brain, cannot be transplanted. Tissues include bones, tendons (both referred to as musculoskeletal grafts), corneae, skin, heart valves, nerves and veins.
Normally everyone has two kidneys, although a person can live a healthy life with one. Living donation occurs when a person freely decides to donate one of their kidneys to someone in need of a transplant. This compassionate gesture offers the individual waiting for a transplant an alternative to dialysis or a deceased donor transplant. Donating a kidney is the most frequent type of living organ donation.