Rectus abdominus
Flexes lumbar region of vertebral column
Levatory Labii superioris
Elevates and everts upper lip in sad expressions
 
Levator Anguli oris
Elevates angle of mouth as in smiling
External Urethral sphincter
Retains urine in bladder until voluntarily voided
 
Diaphragm
Prime mover of inspiration
 
Frontalis
Elevates in glancing upward and expressions of surprise or fight
 
Trapezius
Extends and laterally flexes the neck
 
Nasalis
Widens nostrils narrows internal air passage
 
Levator Palprebra Superioris
Elevates upper eyelid
 
External anal sphincter
Retains feces in rectum until voluntarily voided
 
External abdominal oblique
Supports abdominal viscera against pull of gravity
 
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