The ___________________ is the dorsal diencephalon, containing the choroid plexus and the pineal gland. 00:29 Biology Chapter 8 The ___________________ is the dorsal diencephalon, containing the choroid plexus and the pineal gland. A. epithalamus B. hypothalamus C. thalamus D. third ventricle Answer: epithalamus Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+