Cell theory, Cells - Cell Theory

Robert Hooke

He gave us the word "cell" for use with living things. He discovered cells looking at cork.

Anton von Leeuwenhoek

He saw the first living microorganisms.

Matthias Schleiden

He studied plants. He looked at lots of plants under the microscope; their leaves, flowers, roots and stems. He decided that "All plants are made of cells".

Theodor Schwann

He studied animals. He looked at animal tissues under the microscope and saw cells. He came to the conclusion, "All animals are made of cells".

Rudolph Virchow

He was a doctor. He studied human illness and looked at diseased body tissue. He observed living cells dividing into two parts. He came to the conclusion that living cells reproduced and made new living cells.

Microscope

A tool used by biologists to study microscopic (TINY) details of living things.

All living things are made of cells.

The first part of The Cell Theory based on the work of Matthias Schleiden and Theodor Schwann.

Cells only come from living cells.

The third statement of The Cell Theory. This is based on Rudolf Virchow's observation of living cells reproducing.

Cells

What are the tiny boxes Robert Hooke saw in this drawing?

cell theory

*All living things are composed of cells

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

*New cells are produced from existing cells

cell

The basic unit of life

cell membrane

The thin flexible barrier that surrounds a cell

nucleus

The large membrane-enclosed structure that contains genetic information in the form of DNA and controls many of the cell's acitivities

eukaryotes

Cells that enclose their DNA in nuclei; animal and plant cells

prokaryotes

Cells that do not enclose their DNA in nuclei; bacteria

cell wall

A rigid structure that surrounds the cell membrane and provides support to the plant cell

Chloroplast

An organelle found in plant and algae cells where photosynthesis occurs

Vacuole

Cell organelle that stores materials such as water, salts, proteins, and carbohydrates