Which set correctly lists three major functions of the digestive system?

• A. Hormone production, oxygen transport, and thermoregulation
• B. Digestion, absorption, and elimination (defecation)
• C. Respiration, circulation, and excretion (urination)
• D. Impulse conduction, reflex coordination, and sensory perception

Answer: (B)

Verified step by step guidance

1. Step 1: Understand the primary role of the digestive system, which is to process food to extract and absorb nutrients necessary for the body's energy and growth.
2. Step 2: Identify the key functions involved in this process: digestion (breaking down food), absorption (taking nutrients into the bloodstream), and elimination (removing waste products as feces).
3. Step 3: Compare the given options to these functions. Note that hormone production, oxygen transport, thermoregulation, respiration, circulation, excretion, impulse conduction, reflex coordination, and sensory perception are functions related to other body systems.
4. Step 4: Recognize that digestion, absorption, and elimination (defecation) are the three major functions that correctly describe the digestive system's role.
5. Step 5: Conclude that the correct set listing the major functions of the digestive system is digestion, absorption, and elimination (defecation).