A patient presents following a fall from a horse and requires an intercostal catheter to be inserted for a right sided pneumothorax. A typical intercostal catheter (or chest tube) is a large-bore, thick, plastic tube (picture shown) and may cause injury to various structures if placed incorrectly.

The doctor does not recall the recommendations for chest tube insertion. They consider placing the tube at the midaxillary line, 8th intercostal space on the right side. If the doctor proceeds with inserting the chest tube at this site, which structures are MOST LIKELY to be damaged?