What causes a pulmonary embolism? Blood clots can form for a variety of reasons. Pulmonary embolisms are most often caused by deep vein thrombosis, a condition in which blood clots form in veins deep in the body. The blood clots that most often cause pulmonary embolisms begin in the legs or pelvis.
All ribs are attached posteriorly to the thoracic vertebrae. The neck of the rib is the flattened part that extends laterally from the head. The neck is about 3 cm long, and is placed in front of the transverse process of the lower of the two vertebrae with which the head articulates.
Confidence votes 1.5K. The ribs are attached at the thoracic region of the spinal column. There are twelve vertebra that make up the thoracic spine. Which can be referred to as T1, the top of the thoracic spine through the bottom of the thoracic spine T12 or T1 - T12.