GENERAL HISTOLOGY

Detailed explanation-1: -Abdominal aorta. The abdominal aorta emerges from the aortic orifice of the diaphragm at the level of T12 vertebra. It begins its course anterior and to the left of the vertebral column and continues downwards for about 10 cm.

Detailed explanation-2: -NORMAL ANATOMY. The thoracic aorta begins at the heart, at the level of the aortic valves. The thoracic aorta becomes the abdominal aorta at the diaphragm, just proximal to the celiac artery origin, usually at the T12 vertebral body.

Detailed explanation-3: -The thoracic aorta begins at the aortic arch and runs anterior to the middle axis of the vertebral body. The position of the aorta changes with the arrangement of spine.

Detailed explanation-4: -Results: In supine position, the aorta is positioned left lateral to the vertebral body at midthoracic levels (T4-T8) and more anterior to the vertebral body at lower thoracic levels (T9-L2).