|Cross section through the thorax at vertebra T2
This section cuts through the superior mediastinum above the aortic arch.
|Cross section through the thorax at vertebra T3.
This section is also through the superior mediastinum but a little lower than the one above. You are looking up and into the aortic arch.
Although not labeled, you should be able to make out the openings of the brachiocephalic, left common carotid and left subclavian arteries.
|Cross section through the thorax at vertebra T5.
This section cuts through the anterior, middle and posterior mediastina.
You now see the ascending and descending aortae as well as the pulmonary trunk.
|Cross section through the thorax at vertebra T8.
This section cuts through the heart in such a way that all four chambers of the heart are seen. You should also be able to differentiate the anterior, middle and posterior parts of the inferior mediastinum.
|Cross section through the thorax at vertebra T9.
This section is taken just below the one above except that you are now beginning to cut into the abdomen. On the right side, you can see a piece of the liver which is just beneath the diaphragm. The dome of the right diaphragm is usually higher because of the massive liver below it.
|This is copyrighted©1999 by Wesley Norman, PhD, DSc|