There are many acceptable explanations as to the difference between anatomy and physiology.
The more commonly used ones are:
The Structure and Function of an Animal Cell and its Organelles
The discovery of cells
1635 – 1703: Robert Hooke: A scientist from England who studied the cork tree. When he discovered corks had holes, he named the holes “cells”. He then decided all things are made of cells.
1804 – 1881: Matthias Schleiden: A German scientist who was the leader in studying plant cells. He used a microscope to study plants and determined that they are made of cells.
1810 – 1882: Theodor Schwann: Also, from Germany, Schwann was a leader in studying animal cells. He studied many things and concluded that all animals are made up of cells.
1854 – 1902: Rudolph Virchow: A German doctor who discovered that new cells do not form on their own. He decided that new cells form when old cells divide.