What key function occurs in the bowel?

The primary function of the bowel, or intestines, is vital for the digestive process, specifically the digestion of food and the absorption of nutrients. The small intestine plays a crucial role in breaking down food substances with the aid of digestive enzymes and bile, allowing nutrients such as carbohydrates, proteins, fats, vitamins, and minerals to be absorbed into the bloodstream for use by the body.

After the small intestine has completed its work, any remaining indigestible substances are passed into the large intestine, where water and electrolytes are reabsorbed, and the remaining material is prepared for excretion. This process is essential for nourishment, energy production, and overall health, making it the most accurate response regarding the key functions of the bowel.

In contrast, the other options do not accurately depict functions associated with the bowel. The absorption of oxygen into the bloodstream occurs in the lungs, hormone production is primarily associated with organs like the pancreas and glands, and blood filtration is conducted by the kidneys.