|Used to communicate with Mission Control and with arriving and departing spacecraft.
|Delivers new crews to the ISS and brings returning crews back to Earth. The crew ships in use are the Russian Soyuz spacecraft and the U.S. space shuttles.
|Has living quarters with showers, private compartments, and an eating area.
|Houses equipment for microgravity experiments on materials and living things.
|Connects sections and provides passageways and storage space.
|Provides an emergency egress from the ISS in case of need, such as when a crew member becomes ill or the station becomes uninhabitable.
|Houses systems to remove carbon dioxide and maintain temperature, oxygen, and air pressure levels. Also, provides storage and space for aquaculture gardens.
|Produce electricity for use during both the daylight and dark parts of the orbit (45 minutes of each in continuous rotation).
Russian Progress and U.S. space shuttles
|Bring supplies and remove waste. The Progress has no onboard crew and is guided to the ISS by commands sent by Earth-based controllers in Russia.
|Vent excess heat built up by the space station into the cold of space.
|Serve as the long backbone of the space station, holding the solar arrays, radiators, and modules together.