The Skeletal Muscle System of the Human Body

The Skeletal Muscle System of the Human Body

In this lesson you will learn the names of the most important muscle in the human body. Of course the skeletal muscle system of the human body has a lot more muscles but the ones illustrated here are the most important ones for the instructions on Flash Mavi. Note: A flexor is a muscle which bends a limb and an extendor extends a limb.


  • Stemocleidomastoid (throat muscle - frontside)
  • Bicpes (upper arm muscle - fron side - flexes the arm - bends the elbow)
  • Pectoralis (chest muscle - also called pecs - used for pushups)
  • Brachioradialis (forearm muscle - side)
  • Rectus Abdominis (stomach muscles - also called abdominals or abs)
  • External Oblique (waist muscle - on the sides of the abdominals)
  • Rectus Femoris (the leg extensor between vastus medialis and vastus lateralis - middle of the quadriceps)
  • Sartorius (a thin, long muscle that goes from the inside of the knee to the outside of the hip)
  • Vastus Lateralis & Medialis (inner and outher muscles on the front side of the thigh. laterailis = outside, medialis = inside)
  • Tibialis (front side of the lower leg - opposite of the calf muscle - flexor)
  • Deltoids (shoulder muscles - also called delts)
  • Trapezius (neck muscle - goes from the head to the back - also called traps)
  • Triceps (muscles on the back side of the upper arm)
  • Latissimus Dorsi (biggest back muscle - That's the muscle you need for rowing or chinups - also called Lat)
  • Gluteus Maximus (butt muscle - also called glute / glutes)
  • Biceps Femoris (upper part of the back side of the leg muscle - flexor - goes from the knee to the glutes)
  • Semitendinosus (next to the biceps femoris - inside - biceps femoris and semitendinosus are the hamstrings)
  • Gastrocnemius (calf muscles - extend the foot)
  • Soleus (flat broader calf muscles underneath the gastrocnemius)


  • It will be easier to follow some of the weight training and stretching instructions if you know the most important muscles.
  • The human skeleton with its muscles is called "Muscoskeletal System" (Muscles and bones allow us to move around)