In humans, large intestine is lined with mucus to:

Explanation

In the human digestive system, the large intestine plays a crucial role in absorbing water and electrolytes, forming and expelling feces. It is lined with mucus, which serves several functions, primarily to shield the intestinal walls from the harsh, fluctuating pH levels that can occur during the digestive process. This protective layer helps prevent damage to the cells lining the intestine. While mucus does assist in the movement of waste materials, its key role is in protection. Increasing surface area for absorption and facilitating ion transport are not functions of mucus in the large intestine.