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Multiple Choice
Which of the following is NOT a primary function of the digestive system?
A
Production of blood cells (hematopoiesis) in red bone marrow
B
Mechanical and chemical breakdown of food into smaller molecules
C
Elimination of indigestible material as feces
D
Absorption of nutrients and water into the bloodstream or lymph
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Verified step by step guidance
1
Step 1: Understand the primary functions of the digestive system. The digestive system is mainly responsible for breaking down food, absorbing nutrients, and eliminating waste.
Step 2: Review each option and relate it to the known functions of the digestive system. For example, mechanical and chemical breakdown of food is a key digestive process.
Step 3: Recognize that absorption of nutrients and water into the bloodstream or lymph is a critical function of the digestive system, allowing the body to utilize food components.
Step 4: Identify that elimination of indigestible material as feces is part of the digestive system's role in waste removal.
Step 5: Note that production of blood cells (hematopoiesis) occurs in red bone marrow, which is part of the skeletal system, not the digestive system, so this is NOT a primary function of the digestive system.