What does the word vitals mean?

Usage examples for vitals

  1. He'll get at my vitals one of these days, no doubt. – Will Warburton by George Gissing
  2. Oh, my dear, the time came when I wished that I had no son, when the sharpness of the serpent's tooth entered my very vitals. – Doctor Luttrell's First Patient by Rosa Nouchette Carey