Astronaut Life-Support Backpack
A portable life-support backpack supplies breathing oxygen, pressure regulation, and cooling fluid during spacewalks.
A4 format (landscape), black outlines on a white background · for home and classroom use
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Astronaut Life-Support Backpack Systems
The Primary Life Support System (PLSS) is a self-contained backpack unit worn by astronauts while working outside their spacecraft. Its segmented casing houses high-pressure oxygen tanks, water circulation pumps, battery packs, and flexible connecting hoses that deliver vital resources directly into the spacesuit.
Science of Portable Space Support
Inside the backpack, a sophisticated ventilation system removes carbon dioxide and moisture from the air breathed by the astronaut. Water circulates from the backpack through tubes in the astronaut's inner garment to carry away excess body heat. Emergency backup oxygen tanks are mounted on top of the main unit to provide extra breathing gas if primary supplies run low.
Real Colors of a Life-Support Backpack
- Outer casing: High-reflectivity white fiberglass composite material
- Connecting hoses: Dark gray or metallic silver flexible tubing with blue couplings
- Oxygen storage cylinders: Metallic gray or white pressure vessels
- Control modules: Dark gray or black electronic housing boxes