Final answer:
A thoracic SC cross-section refers to a cross-section of the spinal cord in the thoracic region. Thoracic vertebrae have specific characteristics, including a long spinous process and articulation sites for rib attachment. Cross-sections of the spinal cord in the thoracic segment show different regions of gray and white matter.
Step-by-step explanation:
A thoracic SC cross-section refers to a cross-section of the spinal cord in the thoracic region.
Thoracic vertebrae in the vertebral column are larger than cervical vertebrae. They have a long spinous process that projects downward and overlaps the next inferior vertebra, as well as articulation sites (facets) on the vertebral body and a transverse process for rib attachment. These features are important for the type and range of movements available to the thoracic region of the vertebral column.
Cross-sections of the spinal cord in the thoracic segment show the posterior, anterior, and lateral horns of gray matter, as well as the posterior, anterior, and lateral columns of white matter.