to the leg its just small scratch
a systemic infection affects a number of organs and tissues and can also effect the whole body. a localised infection is an infection that is restricted or limited to a specific body part or region
The part that was bitten
heart
It depends entirely on what the infection is and which body part(s) the infection is affecting. You'll have to see a doctor to determine these.
normally your hair, mostly every part of your body.
Groin
An endogenous infection is from biological material in one part of the body, where it is safe, intruding into a part of the body, where it can do harm - (stomach acid in the chest cavity, faecal matter in the blood etc) Just a guess!!
yes, it would bite off any other body part, why woulden't it bite off your head?
Liver.
the legs
the lungs
The eyes.