Question

What is at the opening at the end of the digestive tract from which solid wastes are eliminated?

Answer 1

The anus.

Explanation:

The digestive tract, which starts with the mouth, the oral cavity, moves on to the oesophagus, the stomach, the small and large intestines, ends with the rectum which stores faeces (waste material after the completion of digestion and nutrient absorption).

The rectum opens to the outside with an opening called the anus. The anus is controlled by two sphincters, or circular muscles - the internal anal sphincter and the external anal sphincter which maintain the constriction of the anus to prevent leakage of waste material.

These muscles relax when required to expel the waste. The internal sphincter is involuntary while the external sphincter is voluntary.