The _________________________ muscles originate on the spinous processes of the T11, T12, and L1 through L3 vertebrae and course up and laterally to insert into the lower margin of the lower five ribs. Contraction of these muscles pulls the rib cage down for expiration.

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The Answer of The _________________________ muscles originate on the spinous processes of the T11, T12, and L1 through L3 vertebrae and course up and laterally to insert into the lower margin of the lower five ribs. Contraction of these muscles pulls the rib cage down for expiration.

The _________________________ Muscles Originate on the Spinous Processes of the T11