Biology Regents Practice Exam

The large intestine primarily functions to absorb water and electrolytes from undigested food material, which plays a crucial role in maintaining the body’s hydration and electrolyte balance. As food passes through the large intestine after its journey through the small intestine, the material is gradually dehydrated, allowing for the formation of feces. This process involves the reabsorption of water, which is vital for preventing dehydration and ensuring that the body retains necessary fluids. The resulting feces are then stored until they are ready to be expelled from the body.

In the context of digestive processes, other structures and organs handle the digestion of proteins and fats. Bile is produced by the liver and stored in the gallbladder, not the large intestine. Furthermore, while some digestive enzymes are produced in the body, they are primarily synthesized by the pancreas and other organs, rather than the large intestine itself. This reinforces the specific and crucial role of the large intestine in water absorption and feces formation.