Surgical terms, also called free flap, or free autologous tissue transfer or microvascular free tissue transfer, describe the "transplantation" of a particular tissue from one part of the body to another to repair an existing tissue loss. "Free" refers to the area where the tissue is completely separated from the bloodstream ("donor area") and then to the region where it is connected by transferring blood to the vascular ("recipient area"). Unlike "pedicled" flaps in which blood circulation is partially released, free flaps are completely separated from the recipient area together with blood vessels and connected to the blood vessels in the recipient area in the new place.