Final answer:
The medulla in the brain contains several tracts and nuclei. One important tract is the corticospinal tract, which passes through the medulla. The medulla also contains nuclei such as the cardiovascular center, which controls the cardiovascular system.
Step-by-step explanation:
The medulla contains several tracts and nuclei. One important tract is the corticospinal tract, which descends from the cortex through the medulla. Another significant landmark is the pyramidal decussation, where most of the fibers in the corticospinal tract cross over to the opposite side of the brain. The medulla also contains nuclei such as the cardiovascular center, which regulates the smooth and cardiac muscle of the cardiovascular system.