On the outside, an elephant, a sunflower and an amoeba are very different. They are all made of the same building blocks on the inside. Each and every living being on Earth is made of cells, from the single cells that make up the simplest species to the trillions of cells that make up the human body. This is part of the theory of cells, which has been one of biology's core concepts. The theory of cells also notes that cells are the fundamental building blocks of living organisms and that all cells derive from
If not for improvements to the microscope, the detection of the cell would not have been feasible. The construction of the existing compound microscope was improved by scientist Robert Hooke in 1665. Three lenses and stage lights were used for his compound microscope. It lit up the specimens and expanded them. A piece of cork was placed by Hooke under the new microscope. This helped him to see something incredible. The cork, to him, looked like it was made of tiny pores. He came to name them "cells" because he was reminded of the