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Human Muscles

Muscles in the body and what they do

TermDefinition
Pectoralis major Draws arm forward and toward the body
Serratus anterior Helps raise arm, contributes to pushes, draws shoulder blade forward
Biceps brachii Bends forearm at elbow
Rectus abdominus Compresses abdomen, bends backbone, compresses chest cavity
External oblique Lateral rotation of trunk, compresses abdomen
Adductor longus Flexes thigh, rotates thigh laterally, draws thigh toward body
Sartorius Bends thigh at hip, bends lower leg at knee, rotates thigh outward
Quadriceps group Flexes thigh at hips, extends leg at knee
Tibialis anterior Flexes foot toward knee
Deltoid Raises arm
Trapezius Lifts shoulder blade, braces shoulder, draws head back
Triceps brachi Straightens forearm at elbow
Latissimus dorsi Rotates and draws arm backward and toward body
Gluteus maximus Extends thigh, Rotates thigh laterally
Hamstring group Draws thigh backward, bends knee
Gastrocnemius Bends lower leg at knee, bends foot away from knee
Achilles tendon Connects gastrocnemius muscle to heel
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