Sleep is a brain state so really nothing goes to sleep in your body except for your brain.
However your body is in a state of atonia while you are sleeping (during REM sleep). Atonia means that the motor signals from your brain are cut off from your body essentially paralyzing your body so you can't move around while you are sleeping. This is controlled by the pons [1] and the mesopontine tegmentum [2] in your brain.
The largest organ in the human body is the SKIN.
the skin. however, internally, the liver is the largest organ.
legs
The heart is the first organ to form in a human embryo. It begins to develop and beat as early as week 3 of gestation.
kidneys
The liver is the heaviest internal organ in the human body, weighing about 3 pounds on average.
Impregnation of the female by insertion of the erect male organ and the emission of semen fluid.
Skin
No a human being can not live forever even if he or she changes their internal organ
Xenotransplantation is the transplanting of animal tissues and organs into a human, and is being studied as a substitute for human organ donors.
The largest human organ is the skin.
AnswerYes, I think so.