Infundibular stalk:

AKA infundibulum or pituitary stalk, the infundibular stalk is a tube-like structure that connects the posterior pituitary to the hypothalamus. It allows for hormones synthesized in the hypothalamus to be sent to the posterior pituitary for release into the bloodstream.

Learn more: Know your brain - Pituitary gland

                       Know your brain - Hypothalamus

Watch this 2-Minute Neuroscience video to learn more about the pituitary gland.