Question

which of the following body cavities travels down the midline of the back?
thoracic cavity
spinal cavity
abdominal cavity
pelvic cavity

Explanation:

The spinal cavity is located along the midline of the back, housing the spinal cord. The thoracic cavity is in the chest area, the abdominal cavity is in the belly region, and the pelvic cavity is in the lower abdomen/pelvic area.

Answer:

Spinal cavity