Allen, Michael; Gillespie, Robert; and Tellejohn Hayes, Pamela. (1994). Essential Elements for Strings: Book I, Cello. Milwaukee: Hal Leonard Corp., p. 2.
"Cello" is a shortened form of the word "Violoncello". Here is the picture of the cello that appears in your book on page 2. Please note how the parts are labeled. Please remember that "pegs" and "tuning pegs" are the same thing.
When you have studied the picture of the instrument, study the picture of the bow by clicking on button labeled "The bow" on your left.