8. 1590 – ZACHARIAS JANSSEN, invented
the primitive microscope.
1663-1665 – ROBERT HOOKE, used corks
and observed hollow, small structures and
called it cells.
1665-1676 – MARCELLO MALPIGHI and
NEHEMIAH GREW, conducted separate
investigation on plant cells and determined
the presence of organelles within its cells.
9. 1670-1683 – ANTON VAN LEEUWENHOEK,
upgraded Janssen’s microscope and
produced his own lens.
1831 – ROBERT BROWN, discovered the
NUCLEUS.
1838 – MATTHIAS SCHLEIDEN,
recognized that plant parts came from cells.
1839 – THEODOR SCHWANN, declared
that animals are also composed of cells.
10. 1840 – ALBRECHT VON ROELLIKER,
stated that sperm and egg are composed of
cells and that all humans are configured
from cells.
1849 – LOUIS PASTEUR, developed
fermentation.
1858 – RUDOLF VIRCHOW, “Omnis
cellula e cellula”
