Transcript FOUNDERS OF CELL THEORY

FOUNDERS OF
CELL THEORY
ROBERT HOOKE
• Robert Hooke
used a _______
microscope to
study ________
(obtained from
dead oak bark)
ROBERT HOOKE
• He called them
_______
because they
reminded him of
the small rooms
________ lived
in at the
monastery
ROBERT HOOKE
• ________ ARE
THE BASIC
UNITS OF ALL
LIVING
THINGS!!!
Matthias Schleiden
• Matthias
Schleiden is a
German scientist
who studied
________
Matthias Schleiden
• He concluded that
_______________
_______________
Theodor Schwann
• Theodor
Schwann is a
German scientist
who studied
__________
Theodor Schwann
• He concluded that
_______________
_______________
CELL THEORY
• The CELL THEORY is
made up of ___ parts.
CELL THEORY
• 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.
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
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Eyepiece
Body tube
Coarse Adjustment
Fine Adjustment
Arm
Base
Light Source
Diaphram
Stage
Stage clip
Low power objective
High power objective