Homeostasis refers to a system's ability
to regulate its INTERNAL environment.
The Big Bang Theory Season 6, Episode 2
No, he cut open a tauntaun and used
its INTERNAL body heat to warm him up.
The Big Bang Theory Season 2, Episode 23
creating a pair
of INTERNAL connecting rods,
The Big Bang Theory Season 7, Episode 15
At best you can say, "Hey, look, my idea
has an INTERNAL logical consistency."
The Big Bang Theory Season 1, Episode 3
According to the head of INTERNAL medicine
Money Heist Season 1, Episode 5