Annisa has a disorder or disease that the doctors found very difficult to diagnose. Her primary symptom are that her muscles twitch without her control. Then
her metabolism stopped functioning.
Which body systems are working together in this scenario?

Muscular and digestive systems.

Explanation:

Muscular and digestive systems are the body systems which are working together in this scenario because muscular system allows the movement of muscles and digestive system is the system where metabolism of the food occurs. If there is something wrong with the muscular system, the muscles can't perform their function properly while on the other hand, if the digestive system fails to work properly, the metabolism can't happen in our body and our body can be adversely affected.