light bulb	a device that produces light when an electric current goes through it
Crookes tube	experimental electrical tube in which cathode rays were discovered
electric current	it is a flow of electric charge
X-rays	it is a form of electromagnetic radiation
opacity	the state of being opaque
sharpness	intelligence
opaque	preventing light from travelling through
flesh	meat
vary	different from each other
to strike	to hit
diseased	ill
brushstroke	the way in which something is put on
to gasp	to take a short, loudly breath
to collapse	to fall down
CPR	cardiopulmonary resuscitation
cardiac arrest	a condition in which the heart stops beating
to stipulate	to say exactly how something must be done
a fibrillation	irregular contractions of the heart
a galvanometer	a device used to measure small amounts of electric current
impending	something that is going to happen soon
prosthetic limbs	a device that replaces a missing body part
relative	being measured in comparison with something else
limb	an arm or leg
artificial	synthetic
remains	residues
bulky	too big
peg leg	wooden leg
core	the basic and most important part of something
a cuff	a sleeve
a germ	a very small organism that causes disease
a stump	the part of something such as an arm that is left after most of it has been removed
an anesthesia	a state in which someone does not feel pain