The spinal cord is the answer you are looking for.
Answer:
The first physician to emerge is Imhotep, chief minister to King Djoser in the 3rd millennium bce, who designed one of the earliest pyramids, the Step Pyramid at Ṣaqqārah, and who was later regarded as the Egyptian god of medicine and identified with the Greek god Asclepius.
Explanation:
B. Tooth Decay - because of the acid from your stomach rests on your teeth.
