Which organ is primarily involved in absorbing water from indigestible material?

Which organ is primarily involved in absorbing water from indigestible material?

• A. Large intestine
• B. Stomach
• C. Liver
• D. Pancreas

Answer: (A)

Water absorption from indigestible material mainly occurs in the large intestine. After nutrients have been absorbed earlier in the digestive tract, the remaining chyme moves into the colon, where the lining actively takes up water and electrolytes. This reabsorption concentrates the waste into solid feces and helps regulate fluid balance. The process is aided by the gut microbiota and peristaltic movements that gradually push material toward the rectum. The stomach handles digestion with acid and enzymes and passes partially digested food on, but it isn’t where most water reabsorption happens. The liver and pancreas contribute essential digestive juices (bile and enzymes) but not the primary reabsorption of water from indigestible material.

Water absorption from indigestible material mainly occurs in the large intestine. After nutrients have been absorbed earlier in the digestive tract, the remaining chyme moves into the colon, where the lining actively takes up water and electrolytes. This reabsorption concentrates the waste into solid feces and helps regulate fluid balance. The process is aided by the gut microbiota and peristaltic movements that gradually push material toward the rectum.

The stomach handles digestion with acid and enzymes and passes partially digested food on, but it isn’t where most water reabsorption happens. The liver and pancreas contribute essential digestive juices (bile and enzymes) but not the primary reabsorption of water from indigestible material.