The term 'PART INTESTINE' refers to two parts of the human digestive system: the COLON and the caecum. The COLON, also known as the large intestine, is a five-letter word and is responsible for absorbing water and electrolytes from digested food and storing waste until it is ready to be eliminated. The caecum, on the other hand, is a six-letter word and is a pouch located at the beginning of the large intestine that helps to break down food.