After their submarine was trapped, the crew members turned off the heat to conserve power for the breathing system, officials said.

Birds have a better breathing system than that of mammals or lizards.

These are the vital components of your engine's breathing system.

Although this tank is compression contained, personal face masks and independent breathing systems must be kept in place.

But why do the researchers suspect that the spiracle was part of the fish's breathing system?

This makes it relatively simple and cheap but means there is no redundant breathing system, only a double gas supply.

Their breathing systems would supply oxygen for two to four hours at the most, probably closer to two, considering the stress.

He has required constant nursing and remains on a breathing system that prevents him from choking to death.

Though its skin is not scaled like a fish, it definitely has the breathing system of an aquatic species.

The nose constitutes the entrance and exit departments of the breathing system.