Function and structure of small intestine and the large intestine

 The small intestine and the large intestine are both parts of the digestive system, but they have different functions and structures. 

The small intestine is long and narrow, while the large intestine is shorter and wider. The small intestine helps break down food and absorb nutrients into the blood. The large intestine absorbs water and forms solid waste.

The small intestine has tiny finger-like structures called villi, which help absorb nutrients. The large intestine does not have villi, but it has bacteria that help break down waste. The small intestine moves food quickly, while the large intestine moves waste more slowly. Both intestines work together to help digest food and remove waste from the body.