Download Cell Structure & Function

DISCOVERING
CELLS
 All
Living Things Are
Made of Cells.
 Cells
are the basic
unit of structure and
function in living
things
CELLS ARE DISCOVERED
 The
invention of the microscope led
to the discovery of cells. (Hans Jensen
made one of the first microscopes,1590)
A
microscope is an instrument that
makes small objects look larger
Simple microscope has one
lens
 Compound microscope has
more than one

ROBERT HOOKE (1663)
 One
of the first people to
observe cells
 Used a compound
microscope he had built.
 Observed cork
 Cells looked like small
rectangular rooms called
them “cells”
 One inch about 12 hundred
million
ANTON VAN LEEUWENHOEK (1683)
 Made
his own lenses
 Used simple microscopes
 Observed pond water,
named creatures
animalcules
 Observed teeth
scrapings, first to see
bacteria
CELL THEORY
 Many
scientists discoveries
contributed.

Matthais Scheiden (1838) – plants
composed of cells

Theodor Schwann (1839) – animals
composed of cells

Rudolf Virchow (1855) – all cells
come from existing cells
CELL THEORY STATES
 All
living things are composed of
cells
 Cells
are the basic unit of structure
and function in living things
 All
cells are produced from other
cells