An organ, such as the human liver, is made up of specialized that work together to perform a specific function.
A.
nerves
B.
tissues
C.
fluids
D.
glands

IT'S SUPPOSE TO BE LIFE SCIENCE

Are you asking about a street map usage  if so here is your answer  a street map for a very limited area could simply be a bit map or a .jpg image.  but a more general map would probably store the streets as vectors.  but you shouldn't assume that there is one way to do it