Argon gas: An inert gas present in the atmosphere in minute quantities which can be used for stunning.
Carotid arteries: The major arteries that supply blood to the head.
Cortical responsiveness: Responsiveness of the brain.
Cortisol: A hormone which is produced by the adrenal glands and appears in response to stress.
Dressing procedures: Removing the skin, head, feet and intestines from an animal.
Exsanguination: The period when an animal bleeds to death.
Evisceration: Removal of the internal organs of an animal - same as disembowelling.
Impedance: Resistance to a flow of electricity.
Jugular: Large vein in the neck that carries blood to the heart from the head.
Pithing: The insertion of a wire or rod through the hole in the head made by the captive bolt pistol to destroy the lower part of the brain and the spinal cord.
Stunning: Using electricity, gas or a bullet in an attempt to cause immediate unconsciousness.
Stun-to-stick interval: The time interval between stunning and knifing an animal.
Sticking: Sticking a knife into the throat or chest of an animal so that s/he bleeds to death.
Thoracic stick: Using a knife to sever all the major blood vessels near the heart.
Ventricular fibrillation: Uncontrollable twitching of the heart muscle fibres.