The is a highly differentiated brain structure that is too specialized to be considered an early brain region. telencephalon diencephalon medulla metencephalon duodenum

Diencephalon.

Explanation:

The diencephalon is located medially between the cerebral hemispheres. It consists of: thalamus, hypothalamus, epithalamus, metathalamus and subthalamus.

Because of its composition, the diencephalon is highly specialized and participates in various functions in the body. Because of this high specialization, the diencephalon is not an early brain region. Each of the components of the diencephalon has specialized functions that integrate for life. The diencephalon acts as a primary center for sensory information processing and autonomic control.

answer; ///i believe the answer your looking for is (ribosomes);

thats not even an aswer choice