Answer: Meninges and vertebral column.
- A Meninges and vertebral column
- B Skull bone alone, with no other covering
- C The brain, positioned directly above it
- D Rib cage surrounding the thoracic cavity
Correct answer: A. Meninges and vertebral column
Explanation: The spinal cord is protected by the vertebral column (spine) and three meninges layers (dura, arachnoid, pia mater).
Structure of a neuron. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.
Concept context
Brain, spinal cord, neurons, reflex arcs, and sense organs.