Final answer:
The normal length of the small intestine in adults is approximately 600 to 700 cm (6-7 meters), which facilitates digestion and nutrient absorption.
Step-by-step explanation:
The approximate normal length of the small intestine in adults is around 600 to 700 centimeters (6-7 meters or approximately 20-23 feet). This length allows for the digestion and absorption of nutrients. The small intestine includes three parts: the duodenum, jejunum, and ileum. Notably, the small intestine is longer than the large intestine and is termed “small” due to its smaller diameter of about 2.5 to 3.0 cm, compared with the larger diameter of the large intestine.