Good morning class, today we are discussing about the cell theory
Does anyone know a little thing about our topic?
Ma'am there are three postulates of the cell theory
That's right, but we should know first that the discovery of the cell was made through the invention of the microscope between 1665-1838
The first postulate of the cell theory is is all living organisms are composed of cells
Ma'am the English scientist Robert Hooke coined the term “cell” for the box-like structures he observed when viewing cork tissue through a lens
That's right and by the late 1830s,botanist Matthias Schleiden and zoologist Theodor Schwann were studying tissues and proposed the unified cell theory. The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells.
The second postulate of the cell theory is all cells come from pre existing cells by division
Robert Remak , a prominent neurologist and embryologist discovered that the origin of cells was by the division of pre-existing cells
Based on Rudolf Virchow investigations and experiments, he stated that all cells come from preexisting cells, which is the 2nd part of the cell theory: all existing cells are produced by other living cells
That's all for today, thank you for listening
And the last is cells contains heredity information which is passed from cell to cell during cell division. The cell is the most basic unit of life