The term INTESTINE PART can be broken down into two crossword solutions: COLON (5 letters) and CAECUM (6 letters). The COLON is the longest part of the large intestine, and it is responsible for absorbing water and electrolytes from digested food. The caecum is a pouch-like structure located at the beginning of the large intestine, and it is responsible for receiving waste material from the small intestine.