Intro to Anatomy 4: Cell Structure and Function

One of the advantages of being multicellular is that body cells can be specialized to perform different functions. This allows multicellular organisms to be much more efficient than if each cell in the body were identical and performed identical functions.

A handful of the more than 200 different specialized cell types that
can be found in the human body. Because different cells can be
specialized to perform different functions, multicellular organisms to be
much more efficient than can single-celled organisms of the same size.