A spacecraft compartment is composed of two parts: a POD and a CAPSULE. A POD is a small, enclosed compartment, usually with a rounded shape, that is used to store items or passengers. A CAPSULE is a larger, more complex compartment that is designed to protect its contents from the harsh environment of space. Both the POD and the CAPSULE are essential components of a spacecraft, providing storage and protection for the craft's occupants and cargo.