FOUNDERS OF CELL THEORY

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Presentation transcript:

FOUNDERS OF CELL THEORY

ROBERT HOOKE Robert Hooke used a _______ microscope to study ________ (obtained from dead oak bark) light cork

ROBERT HOOKE He called them _______ because they reminded him of the small rooms ________ lived in at the monastery cells monks

ROBERT HOOKE ________ ARE THE BASIC UNITS OF ALL LIVING THINGS!!! Cells Hooke's Microscope

Matthias Schleiden Matthias Schleiden is a German scientist who studied ________ plants

Matthias Schleiden He concluded that ______________________________ all plants are composed of cells

Theodor Schwann Theodor Schwann is a German scientist who studied __________ animals

Theodor Schwann He concluded that ______________________________ all animals are composed of cells

CELL THEORY The CELL THEORY is made up of ___ parts. 3

CELL THEORY MEMORIZE THIS!! 1) All organisms are composed of one or more cells. 2) The cell is the basic unit of structure and organization of organisms. 3) All cells come from pre-existing cells. MEMORIZE THIS!!

Anton van Leeuwenhoek Leeuwenhoek lived at the same time as Robert Hooke, (1600’s) and used a simple light microscope to view object. Over the next 200 years, scientists improve microscopes and develop a compound light microscope. Which uses a series of lenses to magnify objects up to 1500X.

Electron Microscopes First used in the 1930’s & 1940’s Uses a beam of electrons to magnify up to 500,000X Structures within cells can be seen Specimens must be examined in a vacuum Two basic types: Scanning (SEM) Transmission (TEM))

How an Electron Microscope Works

Image of a hydrothermal worm taken with an Electron Microscope

A single Carbon atom

Eyepiece Body tube Coarse Adjustment Fine Adjustment Arm Base Light Source Diaphram Stage Stage clip Low power objective High power objective

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