Respiration

Respiration was one of the seven characteristics of life. (AUDIO: A Handful of Dust)

The First Doctor said that Ian Chesterton could get artifical respiration if his breathing got febrile. (TV: The Sensorites)

Damon gave Thous artifical respiration. (TV: The Underwater Menace)

Roland Summers checked George Patrick Barnham's respiration after he was subjected to the Keller Machine. (TV: The Mind of Evil)

Jo Grant observed that, after falling into a healing coma, the Third Doctor's respiration was very shallow. (TV: Planet of the Daleks)

Whilst the Fourth Doctor was in the Matrix, Spandrell noticed his respiration increase. As he fought a mental battle with Goth, his respiration became shallow. (TV: The Deadly Assassin)