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.
Every single rib is attached to its respective vertebrae, which are the bones that connect together to form the vertebral column, more commonly called the spinal column. There are a total of 33 vertebrae in a human spine, or backbone, which is divided into cervical, thoracic, lumbar, sacral, and coccygeal sections.he first seven ribs on either side of the body connect to the sternum via their respective costal cartilage. The eighth, ninth, and tenth ribs attach to the sternum indirectly. Their costal cartilage connects to the preceding rib's costal cartilage, while the last two ribs do not attach to the sternum at all.