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muslces of the head
muscles of the abdomen
4 pairs of sheetlike muscles
rectus abdominis functions
support the viscera
stabilize the vertebral column
help in respiration, urination, defecation and childbirth
extend downward and anteriorly from rib to rib
pull ribcage up and outward during inspiration
extend upward and anteriorly from rib to rib
pull ribcage downward during forced expiration
Muscular dome between thoracic and abdominal cavities
Muscle fascicles extend to a fibrous central tendon
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