Question

dura mater
synovial fluid
subarachnoid space
epidural space

Explanation:

Identify the anatomical structure highlighted in blue

The image shows a cross-section of a vertebra containing the spinal cord and its surrounding meningeal layers. The region highlighted in bright blue is the space located outside the dura mater, between the dural sheath and the bony wall of the vertebral canal. Using the Epidural Space Anatomy and Spinal Meninges knowledge points, we identify this outermost space as the epidural space.

Verify the anatomical boundaries

The spinal meninges consist of three layers: the innermost pia mater, the middle arachnoid mater, and the outermost dura mater. The space between the arachnoid mater and pia mater is the subarachnoid space, which contains cerebrospinal fluid. The space outside the dura mater, within the vertebral canal, is the epidural space, which contains adipose tissue and blood vessels. The blue highlighted region clearly represents this outermost protective cushion.

Answer:

• dura mater
• synovial fluid
• subarachnoid space
• epidural space (Correct answer)