History of the CellHistory of the Cell

How are these cells the same and How are these cells the same and how are they different?how are they different?

What is a cell?What is a cell?A cell is the basic unit of life.A cell is the basic unit of life.

A cell is a structure within a living thing that has A cell is a structure within a living thing that has a boundary surrounding the material inside.a boundary surrounding the material inside.

How small is a cell?How small is a cell?

How were cells discovered?How were cells discovered?

Scientists were curious about Scientists were curious about what living things were made what living things were made of.of.

So they created microscopes So they created microscopes to take a closer look at living to take a closer look at living things.things.

Who were the main people involved Who were the main people involved in the discovery of cells?in the discovery of cells?

Anton van LeeuwenhookAnton van LeeuwenhookRobert HookeRobert HookeFelix DujardinFelix DujardinRobert BrownRobert BrownMatthias SchleidenMatthias SchleidenTheodor ScwannTheodor ScwannRudolf VirchowRudolf Virchow

Anton von LeeuwenhoekAnton von Leeuwenhoek1600s.1600s.First to see and describe cells.First to see and describe cells.Used a simple microscope (one lens).Used a simple microscope (one lens).Looked at tiny living organisms in a drop of Looked at tiny living organisms in a drop of pond water (“wee beasties”).pond water (“wee beasties”).

Robert HookeRobert Hooke

1665.1665.First to use the term, First to use the term, “cells.”“cells.”Used a compound Used a compound microscope (2 lenses).microscope (2 lenses).Looked at a slice of cork Looked at a slice of cork (dead cells).(dead cells).Noted for seeing, Noted for seeing, describing, and explaining.describing, and explaining.

Robert BrownRobert Brown

1831.1831.First to identify the nucleus.First to identify the nucleus.Realized that nucleus was doing something Realized that nucleus was doing something important. important.

Felix DujardinFelix Dujardin1835.1835.First to name the jelly-like material in a cell. First to name the jelly-like material in a cell. Called it sarcode.Called it sarcode.Sarcode was later renamed protoplasm.Sarcode was later renamed protoplasm.

Matthias SchleidenMatthias Schleiden

1838.1838.First to conclude that all plants are made of cells.First to conclude that all plants are made of cells.

Theodor SchwannTheodor Schwann

1839.1839.First to conclude that all animals are made of First to conclude that all animals are made of cells.cells.

Rudolf VirchowRudolf Virchow

1855.1855.Cells reproduce: that Cells reproduce: that is where new cells is where new cells come from.come from.““When a cell exists, When a cell exists, there must have been there must have been a pre-existing cell…”a pre-existing cell…”

What is the Cell Theory?What is the Cell Theory?

1. All living things are made of cells. 1. All living things are made of cells. (Schleiden = plants, Schwann = animals)(Schleiden = plants, Schwann = animals)

2. Cells are the basic units of structure and 2. Cells are the basic units of structure and function in living things.function in living things.

3. New cells are produced from existing 3. New cells are produced from existing cells. cells.

(Virchow)(Virchow)

Making a TimelineMaking a Timeline

Construct a timeline of the people involved Construct a timeline of the people involved in the discovery of cells.in the discovery of cells.

Include Include 1. name of the person1. name of the person

2. year of their discovery2. year of their discovery 3. what their discovery was3. what their discovery was