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BIOL131

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Muscle
Origin and Insertion
Action
External Oblique   (O) Outer surfaces of lower 8 ribs (I) Linea alba; anterior half of iliac crest   Flexes laterally; Flexes and rotates trunk; compresses abdomen  
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Infraspinatus   (O) Infraspinus Fossa (I) Greater tubercle of humerus   Laterally rotates arm  
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Internal oblique   (O) Lumbodorsal fascia, iliac crest and inguinal ligament (I) Linea alba, pubic crest, last 3 or 4 ribs   Compresses abdomen; flexes and rotates femur  
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Latissimus Dorsi   (O) Spines of vertebrae T7-S5; lower 3-4 ribs and iliac crest (I) Intertubercle groove of humerus   Extends, adducts and medially rotates arm  
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Pectorials major   (O) Clavicle; sternum; cartilage of ribs 1-6; aponeurosis of external oblique (I) Greater tubercle of humerus   Flexes, adducts and medially rotates arm  
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Pectoralis Minor   (O) Anterior surface of ribs 3-5 (I) Coracoid Process   Depresses and pulls scapula anterioraly  
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Rectus Abdominus   (O) Pubic crest and symphysis (I) Xiphoid process, costal cartilages 5-7   Compresses abdomen; flexes trunk  
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Serratus Anterior   (O) Outer surface of ribs 1-8 (or 9) (I) Entire anterior surface of vertebral boreder of scapula   Abducts and stabilizes scapula  
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Subscapularis   (O) Subscapular fossa (I) Lesser tubercle of humerus   Medially rotates arm  
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Supraspinatus   (O) Supraspinous fossa (I) Greater tubercle of humerus   Abducts arm  
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Teres major   (O) Posterior surface of scapular at inferior angle (I) Lesser tubercle of humerus   Extends, medially rotates, and adducts arm  
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Teres minor   (O) Axillary border of scapula (I) Greater tubercle of humerus   Laterally rotates arm  
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Transverse Abdominis   (O) Inguinal ligament; lumbodorsal fascia; costal cartilages of lower ribs; iliac crest (I) Linea Alba; pubic crest   Compresses abdomen  
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Trapezius   (O) Occipital bone; ligimentumnuchae spines of vertebrae C7-T12 (I) Acromion and spine of scapula; Lateral third of clavicle   Elevates, depresses, rotates, adducts and stabalizes scapula  
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External intercoastals   (O) Inferior border of rib above (I) Superior border of rib below   Draws ribs together  
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Created by: RachReile
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