The arbor vitae refers to the white matter of the cerebellum. The brain and spinal cord make up the central nervous system. The olfactory bulb is larger in sheep compared to humans. The primary visual cortex is located in the occipital lobe of the brain.

1. (1)
White matter in the cerebellum
The arbor vitae refers to the cerebellar white matter
(2) Central nervous system
Brain and spinal cord are part of central nervous system
(3) relatively larger than those in humans
The olfactory bulb is larger in a sheep brain than in the human brain.
(4) occipital lobe
primary visual cortex is located in the most posterior portion of the brain's occipital lobe .
Solution
(1)
White matter in the cerebellum
The arbor vitae refers to the cerebellar white matter
(2) Central nervous system
Brain and spinal cord are part of central nervous system
(3) relatively larger than those in humans
The olfactory bulb is larger in a sheep brain than in the human brain.
(4) occipital lobe
primary visual cortex is located in the most posterior portion of the brain's occipital lobe .