The term 'Pouchlike Body Part' can be summarized as a SAC, which is a three-letter word. A SAC is a pouch or pocket-like structure that is found in many organisms, including humans. It is typically a closed cavity or tube that is lined with a membrane and filled with fluid or gas. In humans, sacs are found in the body to store and transport substances such as hormones, enzymes, and other chemicals. They are also used to store and transport waste products. Sacs are found in many different parts of the body, including the lungs, stomach, intestines, and reproductive organs.