What is the upper torso and lower torso?

from where on the body is the lower torso, and from where on the body to where is the upper torso? thanks! :) i need to measure my lower and upper torso seperately for a project.
Update: also, when you say up, does it go all the way up to the top of the head or to the part where your shoulders are at.... with lower torso, do u mean all the way down to the feet end, or where exactly? thank youu! i really need clear definition, because sometimes it takes me a while to understand what you mean.
6 answers 6