In the anatomy of the brain of vertebrates, the<unk>  or prosencephalon is the rostral (forward-most) portion of the brain. The<unk>  (prosencephalon), the midbrain (mesencephalon), and hindbrain (rhombencephalon) are the three primary brain vesicles during the early development of the nervous system. The<unk>  controls body temperature, reproductive functions, eating, sleeping, and the display of emotions. At the five-vesicle stage, the<unk>  separates into the diencephalon (thalamus, hypothalamus, subthalamus, and epithalamus) and the telencephalon which develops into the cerebrum. The cerebrum consists of the cerebral cortex, underlying white matter, and the basal ganglia. In humans, by 5 weeks in utero it is visible as a single portion toward the front of the fetus. At 8 weeks in utero, the<unk>  splits into the left and right cerebral hemispheres. When the embryonic<unk>  fails to divide the brain into two lobes, it results in a condition known as holoprosencephaly.
Forebrain
Hindbrain
Retina
Brainstem
Barrel cortex
Electuary
Diencephalon
Spinal cord