There are nearly 700 skeletal muscles in the human body. The precise number varies because not all scientists agree about what constitutes a separate countable muscle and what is considered to be part of a larger muscle.
There are 200 main skeletal muscles. These are the muscles that do the obvious work of the body, such as the biceps, the quadriceps, the pectorals, the abdominals and the obliques. There are another 100 muscles or so that control the movements of the face, the hands and the feet. There are about 400 more, such as tiny facial muscles, tongue muscles, muscles that move the eyeballs and muscles of the pelvic floor, that are so small and so obscure that only medical specialists ever need to know about them.