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.
At some time before death or right after it, the doctor may ask about donating organs such as the heart, lungs, pancreas, kidneys, cornea, liver, and skin. Organ donation allows healthy organs from someone who dies to be transplanted into living people who need them. People of any age can be an organ donor.