The origin of the muscle is the lower borders of the transverse processes of lumbar vertebrae (L1-L5), inner surface of the ilium, sides of the bodies of the last thoracic vertebra (T12), all the lumbar vertebrae (L1-L5), intervertebral fibrocartilages, and base of sacrum.

The steps in the formation of extrusive igneous rocks are listed below in an incorrect order: 1. rock melts due to high temperature. 2. rock is buried deep under earth's surface. 3. magma is forced out of earth's surface during volcanic eruption. 4. lava cools and crystallizes to igneous rock. which of these best shows the correct order of steps in the formation of extrusive igneous rocks? 1, 3, 4, 2 2, 1, 3, 4 3, 4, 2, 1 4, 2, 1, 3