Medical Services (abbreviated EMS in some countries) is
a type of emergency service dedicated to providing
out-of-hospital acute medical care, transport to
definitive care, and other medical transport to patients
with illnesses and injuries which prevent the patient
from transporting themselves. Emergency medical services
may also be locally known as a first aid squad,
emergency squad, rescue squad, ambulance, squad
ambulance service, ambulance corps, or life squad.
The goal of most emergency medical services is to
either provide treatment to those in need of urgent
medical care, with the goal of satisfactorily treating
the presenting conditions, or arranging for timely
removal of the patient to the next point of definitive
care. This is most likely an emergency department at a
hospital. The term emergency medical service evolved to
reflect a change from a simple system of ambulances
providing only transportation, to a system in which
actual medical care is given on scene and during
transport. In some developing regions, the term is not
used, or may be used inaccurately, since the service in
question does not provide treatment to the patients, but
only the provision of transport to the point of care.
~Adapted from Wikipedia.