The psoas (sō-ŏz) muscle is approximately 16 inches long. It begins at both sides of the 12th thoracic vertebrae of the back, and stretches all the way down to each of the legs, where it makes a final connection with the lesser trochanter. Also referred to as the "tenderloin," the psoas muscle is very thick and strong, and it is also the largest muscle found in the body.
Thoracic Vertebrae - (T1 thru T12) The 12 segments of the vertebral column between the cervical and the lumbar vertebrae, giving attachment to the ribs and forming part of the posterior wall of the thorax. Symbols T1–T12.
Thoracic vertebrae - Wikipedia, the free encyclopedia Twelfth thoracic vertebra The twelfth thoracic vertebra has the same general characteristics as the eleventh, but may be distinguished from it by its inferior articular surfaces being convex and directed lateralward, like those of the lumbar vertebrae; The thoracic spinal nerve 12 (T12) passes out underneath it.
Surface projections of the major organs of the trunk, using the vertebral column and rib cage as main reference points of superficial anatomy. The transpyloric plane and McBurney’s point are among the marked locations. Locations of specific organs: The following vertebral levels are generally given by the middle of the vertebral body: The oblique fissure of the right lung goes from the spinal process of thoracic vertebra 3 towards the navel The horizontal fissure goes along the 4