Which one of the following parts of human alimentary canal can be of maximum length?

The small intestine is the longest part of the human alimentary canal [2]. Although it is called 'small' due to its narrower diameter compared to the large intestine, it measures approximately 6 to 7 meters (about 20-22 feet) in length in an average adult [1]. In contrast, the large intestine is significantly shorter, measuring roughly 1.5 meters (5 feet) in length [3]. The stomach is even shorter, typically measuring about 30 cm (12 inches). The small intestine's extensive length and coiling allow it to fit into a compact space within the abdomen, providing a massive surface area essential for the primary digestion and absorption of nutrients [2]. While measurements can vary between living individuals and cadavers due to muscle tone, the small intestine consistently remains the longest segment of the digestive tract.

Sources

1. [1] Science-Class VII . NCERT(Revised ed 2025) > Chapter 9: Life Processes in Animals > Small Intestine > p. 125
2. [2] Science , class X (NCERT 2025 ed.) > Chapter 5: Life Processes > Activity 5.3 > p. 86
3. [3] Science-Class VII . NCERT(Revised ed 2025) > Chapter 9: Life Processes in Animals > Large intestine > p. 126