which is the longest part of the digestive system Share with your friends Share 2 Shivam Jha answered this small intestine is the longest part of digestive system in humans 3 View Full Answer Hiba K S answered this Small intestine 0 Adeeba Bathul answered this The small intestine is the longest part of our digestive system which is 6 metres or 20 feet long. -1 Anvi Nigam answered this It is the large intestine but in actual largest part is small intestine, it is about 6 feet 0