The human intestines consist of two main parts: the small intestine and the large intestine.
- The small intestine is the longer section, typically ranging from about 9 to 16 feet (approximately 3 to 5 meters) in length in living adults. Some sources note it can be as long as 20 to 25 feet depending on measurement methods and individual variation
. It is divided into three parts:
* Duodenum: about 7.9–9.8 inches
* Jejunum: about 8 feet
* Ileum: about 9.8 feet, the longest section
- The large intestine is shorter, about 5 feet (1.5 meters) long on average. It includes the cecum, colon (the longest part), rectum, and anus
Together, the small and large intestines measure roughly 15 feet or more in total length, with considerable variation between individuals
. Despite the name, the "small" intestine is long but has a smaller diameter (about 1 inch), while the large intestine is shorter but wider (about 3 inches in diameter)
. In summary:
Intestine Part| Typical Length
---|---
Small Intestine| 9–16 feet (3–5 m), up to 20–25 feet in some reports
Large Intestine| About 5 feet (1.5 m)
This length allows the intestines to effectively absorb nutrients, water, and electrolytes from food
