Does the thoracic segment of spine include seven vertebrae?

Yes, the thoracic segment of the spine does include seven vertebrae. These are numbered from T1 to T7, starting from the top of the spine. The thoracic vertebrae are located between the cervical vertebrae (at the neck) and the lumbar vertebrae (at the lower back). They are responsible for providing support and structure to the thorax (chest) and for protecting the vital organs located within it, such as the heart and lungs.