Transcontinental railroads in and near the United States (1887). A transcontinental railroad is a contiguous network of railroad trackage that crosses a continental land mass with terminals at different oceans or continental borders.
Normal cervical range of motion is. 1  Flexion â 80 to 90 degrees. 2  Extension â 70 degrees. 3  Lateral flexion â 20 to 45 degrees on both sides.  Rotation â 90Â° of rotation to both sides.
In the adult the five sacral and four coccygeal vertebrae fuse to form the sacrum and the coccyx. The average length of the vertebral column in men is about 71 cm. The cervical part measures about 12.5 cm, the thoracic part about 28 cm, the lumbar part about 18 cm, and the sacrum and the coccyx about 12.5 cm. The vertebral column in women measures approximately 61 cm.