What is the primary function of the small intestine?

What is the primary function of the small intestine?

• A. Digestion and absorption
• B. Absorption only
• C. Filtration of blood
• D. Detoxification of toxins

Answer: (A)

The small intestine’s main job is to finish digestion and absorb nutrients. After chyme enters, pancreatic enzymes and brush-border enzymes continue breaking down carbohydrates, proteins, and fats, turning them into absorbable units. The lining, with its villi and microvilli, provides a huge surface area for taking up amino acids, simple sugars, fatty acids, vitamins, minerals, and water into the bloodstream or lymphatic system. Because digestion and absorption happen together here, this is why the primary function is described as both digestion and absorption. The other options miss essential roles: filtration of blood is mainly a kidney function, and detoxification of toxins is primarily a liver (and other organs) function.

The small intestine’s main job is to finish digestion and absorb nutrients. After chyme enters, pancreatic enzymes and brush-border enzymes continue breaking down carbohydrates, proteins, and fats, turning them into absorbable units. The lining, with its villi and microvilli, provides a huge surface area for taking up amino acids, simple sugars, fatty acids, vitamins, minerals, and water into the bloodstream or lymphatic system. Because digestion and absorption happen together here, this is why the primary function is described as both digestion and absorption. The other options miss essential roles: filtration of blood is mainly a kidney function, and detoxification of toxins is primarily a liver (and other organs) function.