Quizlet Comparative Anatomy - Cat - Muscles - Abdominal

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  1. External oblique: Origin - Lumbodorsal fascia and ribs. Insertion - Linea alba and pubis. Action - Constricts abdomen
  2. Internal oblique: Origin - Lombodorsal fascia. Insertion - Linea alba. Action - Compresses abdomen.
  3. Rectus abdominis: Origin- Pubis. Insertion - Sternum and costal cartilages. Action - Compresses abdomen
  4. Transversus abdominis: Origin - Costal cartilages of lower ribs. Insertion - Linea alba. Action - Constricts abdomen.