Of course the whole system wouldn't function well. Furthermore it may have some difficulties
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Yes Mikahlala17 is right the whole system won't work because a system is made up of different things having their own work so the system will work properly so if one organ does not do its work properly then the system will have a problem.
You can be fed via a tube. It is called TPN or Total Parenteral Nutrition.\
It is used to provide a way for people to receive nutrition when they cannot eat or safely use their gastrointestinal tract for any reason. Its a liquid fed into the veins and provides all that is needed to sustain life. Many who need this do it at night while they sleep.