CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell...

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CELL THEORY A Brief History

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Transcript of CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell...

Page 1: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

CELL THEORY

A Brief History

Page 2: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue

Page 3: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Anton van Leeuwenhoek documented unicellular organisms based on observations of protozoa [1673] and bacteria [1683]

Page 4: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Paramecium - Protocista

Page 5: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Amoeba - Protocista

Page 6: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Matthias Schleiden proposed that cells were the fundamental units of plants based on observations of plant tissue [1838]

Page 7: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Plant cells

Page 8: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Plant Cell

Page 9: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Theodor Schwann proposed that cells were the fundamental units of animals based on observations of animal tissue [1839]

Page 10: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Blood

Page 11: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Sperm

Page 12: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Schleiden and Schwann are credited as the founders of The Cell Theory [1839]

All living things are made of cells.

Cells exhibit the fundamental characteristics of life:

Obtain energy—photosynthesis, chemosynthesis, or digestion Use energy—respire Excrete Waste Show Order Homeostasis Evolve Reproduce Move Respond to changes in environment Grow and repair damage to self

Page 13: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

The development of the Cell Theory involved the input of numerous individuals from various nationalities over many years

Page 14: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Rudolph Virchow stated “omnis cellula a cellula ” [all cells arise from pre-existing cells based on observations of dividing cells [1855]

Page 15: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Rudolph Virchow stated “omnis cellula a cellula ” [all cells arise from pre-existing cells based on observations of dividing cells [1855]

Page 16: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

The Cell Theory was modified to incorporate Virchow’s work

All organisms are made of cells

Cells are the smallest structural and functional unit of an organism [that carries out the life processes]

All cells come from pre-existing cells

Page 17: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

BUT, exceptions remain:

1. Single-celled organisms ARE cells, not composed of cells; that is, they are a-cellular

2. Many cells are unique in composition—muscle cells

and fungal hyphae are multi-nucleated (i.e., more than one nucleus)

Page 18: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

And, what about viruses?

Are not composed of cells but consist of a nucleic acid (DNA or RNA) in a protein coat

Yet conduct all of the cell processes (although with help, not independently)

Page 19: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

SO:

Could there be an organism that does not contain a single cell?

Might there be some other fundamental unit of life? At least, in some cases?

Are the life processes sufficient criteria to distinguish between the living and the non-living?

Page 20: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Microscopes

Max magnification – X1000

Max Resolution 0.2um

Max magnification X1000,000

Max Resolution 0.5nm

Page 21: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Microscopic measurements

mm – millimeters

μm – micrometer

nm - nanometers

1m = 1000mm = 1000,000μm= 1000,000,000nm

Page 22: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Comaparison of Light and Electron Microscopes

Page 23: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Light Microscope

Human Cheek Cell Nerve Cells

Page 24: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Transmission Electron Microscope

Plant Cell Mitochondrion

Page 25: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Scanning Electron Microscope

Human Sperm Insect Head

Page 26: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Sizes of Biological Structures

Thickness of leaf Paramecium Sharp end of pin Plant cell Animal cell Mitochondrion Bacterium Ribosome DNA molecule Hydrogen atom

O.5mm 200μm 100 μm 40μm 20μm 1μm 0.5-1μm 20nm 2nm 0.04nm

Page 27: CELL THEORY A Brief History. Robert Hooke named the cell [1665] based on observations of the cell walls of cork tissue.

Red and White Blood Cells

S.E. M Light Microscope


Cells DI Biology Mrs. Naples. Discovery of the Cell Discovery of the cell – Robert Hooke 1665 – First to use a compound microscope to look at “cells”

Cells DI Biology Mrs. Naples. Discovery of the Cell Discovery of the cell – Robert Hooke 1665 – First to use a compound microscope to look at “cells”

Cells The smallest unit of life. Discovering the Cell 1665 - Robert Hooke.

Cells The smallest unit of life. Discovering the Cell 1665 - Robert Hooke.

Cells. Robert Hooke -1665 In his book, entitled Micrographia, Hooke was the first to use the term cell From the Latin “cella” meaning “small chamber”

Cells. Robert Hooke -1665 In his book, entitled Micrographia, Hooke was the first to use the term cell From the Latin “cella” meaning “small chamber”

Chapter 3 Review of the Cell By: Cortney. Basic Concepts of the Cell Theory In 1665, a scientist named Robert Hooke first described what cells really.

Chapter 3 Review of the Cell By: Cortney. Basic Concepts of the Cell Theory In 1665, a scientist named Robert Hooke first described what cells really.

Structure Of The Cell. Cell History Robert Hooke is credited with the discovery of the cell. (1665) Leeuwenhoek: ( About 1700) He developed microscopes.

Structure Of The Cell. Cell History Robert Hooke is credited with the discovery of the cell. (1665) Leeuwenhoek: ( About 1700) He developed microscopes.

Cell Structure and Function. Scientists responsible for the tools and foundations of cell biology: Robert Hooke 1665 term “cell” observed cork.

Cell Structure and Function. Scientists responsible for the tools and foundations of cell biology: Robert Hooke 1665 term “cell” observed cork.

Chapter 4 Cell Structure. I. Cell Theory (4.1) Hooke first observed cells 1665 Leeuwenhoek first observed live cells. 1838-9 Schleiden and Schwann.

Chapter 4 Cell Structure. I. Cell Theory (4.1) Hooke first observed cells 1665 Leeuwenhoek first observed live cells. 1838-9 Schleiden and Schwann.

Cell Theory Objectives Explain the Cell Theory. December 17, 2015 1 Cells and the Cell Theory Robert Hooke was the first person to describe cells. In 1665,

Cell Theory Objectives Explain the Cell Theory. December 17, 2015 1 Cells and the Cell Theory Robert Hooke was the first person to describe cells. In 1665,

CELL DISCOVE RY AND THEORY 7.1. History of the Cell Theory 1665: Robert Hooke discovered cellulae using a microscope and cork Cell: basic structural.

CELL DISCOVE RY AND THEORY 7.1. History of the Cell Theory 1665: Robert Hooke discovered cellulae using a microscope and cork Cell: basic structural.

The Cell: Basic Unit of Life. Discovery of Cells Discovered in 1665 by Robert Hooke, English scientist and inventor of the light microscope Cell Theory.

The Cell: Basic Unit of Life. Discovery of Cells Discovered in 1665 by Robert Hooke, English scientist and inventor of the light microscope Cell Theory.

The Plant Cell. EARLY STUDIES OF CELLS n English scientist Robert Hooke was the first person to describe cells in 1665. n Hooke examined the microscopic.

The Plant Cell. EARLY STUDIES OF CELLS n English scientist Robert Hooke was the first person to describe cells in 1665. n Hooke examined the microscopic.

CELLS AND CELL THEORY. CELL SCIENTISTS Robert Hooke-1665, observed small cavities in cork which he called cells.

CELLS AND CELL THEORY. CELL SCIENTISTS Robert Hooke-1665, observed small cavities in cork which he called cells.

Chapter 5 Cell Structure and Function. I. The history of cell study A. Robert Hooke—1665—coined the word cell, looked at cork cells B. Robert Brown—1831—

Chapter 5 Cell Structure and Function. I. The history of cell study A. Robert Hooke—1665—coined the word cell, looked at cork cells B. Robert Brown—1831—

Cell Discovery and Theory History of the Cell Theory In 1665, Robert Hooke invented the first simple microscope. He looked at a cork.

Cell Discovery and Theory History of the Cell Theory In 1665, Robert Hooke invented the first simple microscope. He looked at a cork.

A Tour of the Cell . Cells were first discovered in 1665 by Robert Hooke The accumulation of scientific evidence led to the ‘cell theory’

A Tour of the Cell . Cells were first discovered in 1665 by Robert Hooke The accumulation of scientific evidence led to the ‘cell theory’

1 A Tour of the Cell. 2 “cell” In 1665, an English scientist named Robert Hooke coined the term "cell" after viewing slices of cork through a microscope.

1 A Tour of the Cell. 2 “cell” In 1665, an English scientist named Robert Hooke coined the term "cell" after viewing slices of cork through a microscope.

Chapter 7 – The Cell I.A View of the Cell A.Contributing Scientists who came up with ideas about the cell: 1.Hooke (1665) – first saw cork cells & named.

Chapter 7 – The Cell I.A View of the Cell A.Contributing Scientists who came up with ideas about the cell: 1.Hooke (1665) – first saw cork cells & named.

CELLS History, Parts, Functions. Robert Hooke 1665.

CELLS History, Parts, Functions. Robert Hooke 1665.

Cell Structure & Function. Life is Cellular A little history… 1600s: van Leeuwenhoek used microscope to study nature 1665: Hooke used microscope.

Cell Structure & Function. Life is Cellular A little history… 1600s: van Leeuwenhoek used microscope to study nature 1665: Hooke used microscope.

Structure and Function of the Cell Chapter 4. 4.1 Discovering the cell… 1665 – Hooke looked at plants under the microscope and saw little boxes –

Structure and Function of the Cell Chapter 4. 4.1 Discovering the cell… 1665 – Hooke looked at plants under the microscope and saw little boxes –