According to the Supreme Personality of Godhead Shri Krishna in Bhagavad Gita 18.61, this body is like a machine, with various organs equivalent to different parts/instruments of the machine. Else where in 2.20 He describes the driver or the operator of the machine as us, the living beings, the spirit soul which is indestructible. Interestingly, the following recent news is inline with the above facts mentioned in Bhagavd Gita. Do read and share! 25-year old goes 555 days without a heart!