Which of the following lists the major parts of the brain?

• A. Cerebrum, Cerebellum, Brain Stem
• B. Spinal Cord, Nerves, Ganglia
• C. Heart, Lungs, Liver
• D. Cerebellum, Cortex, Thalamus

Answer: (A)

The brain is organized into three major divisions: the cerebrum, the cerebellum, and the brain stem. The cerebrum handles thought, sensation, and voluntary movement, making up the largest part of the brain. The cerebellum coordinates balance, posture, and smooth, precise movements. The brain stem connects the brain to the spinal cord and regulates automatic life-support functions such as breathing and heart rate. So a list that includes cerebrum, cerebellum, and brain stem reflects these three primary brain components, which is why it’s the best choice. The other options mix structures that aren’t the main brain divisions (like spinal cord and peripheral nerves, or organs outside the brain), or substitute parts that aren’t considered the three major brain sections (such as cortex and thalamus) without naming the brain stem.