Final answer:
Arteries and blood vessels are medially placed in bone to provide nourishment and remove waste. They enter through nutrient foramina and supply oxygen and nutrients to metabolically active regions of the bone. Nerves also follow the same paths and contribute to blood supply regulation and bone growth.
Step-by-step explanation:
The arteries and blood vessels are medially placed in bone because they need to provide nourishment to the bone cells and remove waste products. The arteries enter the bone through small openings called nutrient foramina and supply oxygen and nutrients to the metabolically active regions of the bone. Nerves also follow the same paths as the blood vessels and play a role in regulating blood supplies and bone growth.