The small intestine is the main organ of digestive system true or false?

True.

The small intestine is the longest part of the digestive system and is responsible for most of the absorption of nutrients from food. It is lined with villi, which are small finger-like projections that increase the surface area of the intestine and help to absorb nutrients. The small intestine also produces enzymes that help to break down food into smaller molecules that can be absorbed.