Medical education is education related to the practice of being a medical practitioner; either the initial training to become a physician (i.e., medical school and internship), or additional training thereafter (e.g., residency and fellowship). Medical education and training varies considerably across the world.
The fuel sending unit assembly may be a combination of the electric fuel pump, the filter, the strainer, and the electronic device used to measure the amount of fuel in the tank via a float attached to a sensor which sends data to the dash-mounted fuel gauge. The fuel pump by itself is a relatively inexpensive part.
How a mechanical (that's what is in most of our collector cars) fuel pump works is deceptively simple. It consists of a rubber diaphragm that is sandwiched between two halves of the housing and actuated by some sort of arm. More about that later, but for now we must distinguish between pusher and puller pumps.