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Muscle Location Function Origin Insertion point Biceps Located on the front side of the upper arm It flexes the forearm at the elbow and supinates the forearm Scapula Radius Triceps Opposite side of the biceps of the upper arm. Back side of upper arm. The triceps extend the lower arm Scapula and humerus Ulna Deltoids Muscle forming the rounded contour of the shoulder It abducts, flexes and extends the upper arm Clavicle and scapula Humerus Pectoralis major The pectoralis major muscle is a very large muscle in the chest. It flexes and abducts the upper arm Clavicle, sternum and oblique’s Humerus Rectus abdominis Muscles on each side of the anterior wall of the human abdomen more commonly known as abs for short. It causes the flexion and rotation of the lumbar section of the vertebrae Pubis and iliac crest Rib cage Rectus femoris Located in the upper leg. This is also one of the quadriceps Extends the lower leg and flexes the thigh Ilium Tibia and patella Vastus lateralis This is the largest part of the quadriceps femoris. Located on the upper leg. Extends the lower leg and flexes the thigh Femur Tibia and patella Vastus medialis This is a muscle located in the thigh. It is located on the upper leg. This is also one of the quadriceps Extends the lower leg and flexes the thigh Femur Tibia and patella Vastus intermedius Located under the rectus femoris muscle. This is also located in the upper leg. This is also one of the quadriceps Extends the lower leg and flexes the thigh Femur Tibia and patella Semimembranosus Located at the back of the thigh and it is also one of the hamstrings Flexes the lower leg and extends the thigh Ischium Fibula and tibia Semitendinosus Located at the back of the thigh and it is also one of the hamstrings Flexes the lower leg and extends the thigh Ischium Fibula and tibia Biceps femoris Located at the back of the Flexes the lower leg Ischium Fibula and thigh and it is also one of the three hamstrings and extends the thigh tibia Gastrocnemius This is in the back part of the lower leg also known as the calf muscle Plantar flexion of the foot Femur Calcaneus (heel bone) Soleus Muscle in the back part of the lower leg also known as the calf Plantar flexion of the foot Tibia and fibula Calcaneus (heel bone) Tibialis anterior Located in the upper twothirds of the outside surface of the tibia Dorsi flexion of the foot Tibia Metatarsals Erector spinae Located at the back specifically located at the middle or lower back. Extension of the spine Sacrum, ribcage and all the vertebrae Ribcage, vertebrae and base of the cranium Teres major Located on the underside of the upper arm, in the area between the shoulder and elbow Rotates and adducts the arm Scapula Humerus Trapezius Covers our upper back and extends down to the middle of our spine Elevates and retracts the shoulders Vertebrae Scapula and clavicle Latissimus dorsi Located in the back. It is one of the biggest muscles located in the back. Abducts the arm Vertebrae, sacrum, scapula and the ribcage Humerus Oblique’s Found on the outer side of the abdominal muscles, it extends from the crest of the ilium to the pectorals. On one side, other abdominals cover the stomach, Lateral flexion of the body Iliac crest Ribcage Gluteus Maximus Located in the butt and is the strongest muscle in the human body it is also known as the gluteals Extends the thigh Ilium, sacrum and coccyx Fibula