Digestion
I am pretty sure that it is called Excretion.
The Excretory system gets rid of wastes.
Excretion means getting rid of, the process is the process of getting rid of your excretorial wastes, or your stool.
Get rid of the body wastes.
The nervous system does not directly get rid of body wastes
If not, it will fester and poison your system.
Mainly the kidneys.
The large intestine
urinary
Urine and Stool
The circulatory, endocrine, muscular, and nervous systems help rid the body of wastes via the kidneys. The muscular and nervous systems help rid the body of solid wastes via the rectum. The nervous and circulatory systems help rid the body of wastes via the skin. The circulatory, skeletal, nervous, and muscular systems help the respiratory system rid the body of gaseous wastes.
The ameba gets rid of carbon dioxide and excess water by the process of exocytosis. This is the process by which gases and other wastes leave the cell through the cell membrane.