failure involves a progressive and irreversible loss of kidney structures, leading to a progressive loss of renal function. failure is a sudden loss of kidney function.

The person who utilize the progression principle will keep adding the difficulty of the exercise that he's doing, while the person who does not, will only stay stagnant.  the person that utilize progression principle, will get a stronger endurance because now his body is conditioned to do harsher routines.{the answer was already on verified)

Awould be the best answer

Answeralong with the tissue lining,the blood,tissue,and unfertilized egg leave the uterus,going through the vagina on the way out of the body,(menstrual period);