A person has been bedridden for months and is incapable of changing position due to being paralyzed. Eventually, a portion of his back developed necrosis. necrosis is a condition which is characterized by usually localized death of living tissue. What do you think is the reason why this happened, given the fact that the person is unable to change his lying position (PLS DON'T COMMENT IF YOU DON'T KNOW THE ANSWER)