Which of the following is about 23 feet long in an average adult human being?

Correct option is D

The correct answer is (d) Small intestine.
· The small intestine in an average adult human being is approximately 23 feet long. It plays a crucial role in digestion and absorption of nutrients.
· It is divided into three parts: the duodenum, jejunum, and ileum, and it helps in the breakdown and absorption of food.
Information Booster:
· Liver: The largest internal organ, but not measured in length.
· Large intestine: Much shorter, about 5 feet long.
· Appendix: A small, vestigial organ, typically about 4 inches long.
Source: Human Anatomy Textbooks, Digestive System.