Relacionar Columnas Principle muscle of trunkVersión en línea Match por Kristie Borgheiinck 1 Sacrospinalis 2 Levator ani 3 Internal and External Intercostals 4 External abdominal oblique 5 Perineum 6 Diaphragm aids defecation, support the pelvic viscera (posterior from tip of the coccyx to the anal canal) elevate ribs and enlarge thoracic cavity attached to a fill the spaces between the ribs (lie at angles in opposite directions to each other) dome forms the partition between the thoracic cavity and abdominal cavity below (moves down with inhalation) extends vertebral column to produce erect posture (long and thick below the trapezium and latissimus) floor of pelvis, provides support (horizontal lie near genitalia) Compresses abdominal cavity, expel substances from body, and flex spinal column.
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