The medical procedure wherein an organ is transferred from one person to another, in order to replace a missing or injured organ, is termed as organ transplantation. The organs or tissues can also be transplanted within a person's own body. These are known as autografts. The transplants between two individuals of the same species are referred to as allografts. There are numerous organs which can be transferred from one person to another such as kidneys, liver, pancreas, heart, uterus and intestine. The donors can be alive or dead. Tissues can also be taken from donors who die of circulatory death. Transplant rejection is one of the most important challenges to organ transplantation. This book unravels the recent studies in the field of organ donation and transplantation. It outlines the clinical aspects of organ donation in detail. This book will prove to be immensely beneficial to students and researchers in this field.