To which body system does the liver primarily belong?

• A. Digestive system
• B. Skeletal system
• C. Endocrine system
• D. Respiratory system

Answer: (A)

Verified step by step guidance

1. Step 1: Begin by identifying the primary function of the liver. The liver is responsible for processes such as detoxification, production of bile, metabolism of nutrients, and storage of vitamins and minerals.
2. Step 2: Relate the liver's production of bile to its role in digestion. Bile is essential for breaking down fats in the digestive system, which directly links the liver to the digestive system.
3. Step 3: Compare the liver's functions to the roles of other systems listed in the options. For example, the skeletal system is involved in structural support and movement, the endocrine system regulates hormones, and the respiratory system manages gas exchange. None of these systems align with the liver's primary functions.
4. Step 4: Understand that while the liver has secondary roles in processes like hormone metabolism (endocrine system) and detoxification (which indirectly supports other systems), its primary role is in digestion.
5. Step 5: Conclude that the liver primarily belongs to the digestive system based on its main function of bile production and nutrient metabolism.