Most standard anatomy sources say the human body has about 639–650 named skeletal muscles , but there is no single universally agreed number.

Why the number isn’t exact

  • Many muscles are divided or fused differently from person to person, so some anatomists count them as one muscle, while others split them into two or more.
  • Some very small or obscure muscles are included in some catalogs and ignored in others, which can push the count above 700 named skeletal muscles in detailed lists.

So for a quick, practical answer: around 640 muscles is the commonly quoted figure for skeletal muscles in the human body, but the exact count depends on how you define and group them.