Final answer:
The xiphoid process usually aligns with the T10 vertebral level in the thoracic region of the spine, with twelve pairs of ribs connecting to T1-T12 vertebrae.
Step-by-step explanation:
The xiphoid process is located at the inferior tip of the sternum and has a vertebral level corresponding to the thoracic spine. The xiphoid process generally lies at the level of the T10 vertebra when standing in anatomical position. Each rib is connected to the thoracic vertebrae, with 12 pairs of ribs articulating with the vertebrae known as T1-T12. Over time, the cartilaginous structure of the xiphoid process ossifies, starting during middle age.