For clarification, here are commonly asked questions and answers.
Brain death is the irreversible and permanent loss of all brain function.
The brain is damaged beyond recovery. A brain dead person will never be able to think or feel again. It usually occurs when a person has suffered a severe head injury, brain hemorrhage or stroke, or any prolonged lack of oxygen to the brain. Organs are recovered only from people who have been declared brain dead. With this type of death, only tissues can be donated.