Final answer:
A cardiologist would not be involved in the diagnosis and treatment of GI system problems, as they specialize in heart conditions, not the digestive system. Gastroenterologists, dietitians, and gastrointestinal nurses would all be involved in GI health.
Step-by-step explanation:
The health care professional who would not be involved in the diagnosis and treatment of problems in the GI (gastrointestinal) system would be d) Cardiologist. A cardiologist specializes in the diagnosis, treatment, and management of heart conditions, which are unrelated to the GI system. Conversely, a gastroenterologist, dietitian, and gastrointestinal nurse all play roles in managing GI disorders.
A gastroenterologist is a physician with dedicated training and unique experience in the management of diseases of the gastrointestinal tract and liver. A dietitian is an expert in dietetics; that is, human nutrition and the regulation of diet. A gastrointestinal nurse specializes in patient care for those experiencing gastrointestinal issues.