List of muscles you need to know Serratus Anterior Biceps Brachii Rectus Abdominis External Abdominal Oblique Deltoid Pectoralis Major Brachialis Brachioradialis Trapezius Triceps Brachii Latissimus Dorsi Quadricep Hamstring Gastrocnemius Achilles Tendon

Muscles can only contract Since muscles can only contract, you need at least two muscles or a group of muscles to move a body part While one muscle contracts, the opposite muscle relaxes and vice versa for movement in the opposite direction

I feel like the illustrations of muscles in the textbook are a bit inadequate so here are some additional illustrations to help you visualize the muscles

Serratus Anterior – Brings Scapula Forward

Flexing the Elbow Biceps Brachii Brachialis Brachioradialis

Flexing the Spine Rectus Abdominis External Abdominal Oblique

Deltoid