CELL THEORY

Kandinsky“Colorful Ensemble”

inspired by:invertebrate sea

creaturesmicroorganismsembryological

forms

Cajal

Microscopes

Anton von Leeuwenhoek (1632-1723)

first to use microscopes to view living things

Leeuwenhoek’s scope

He looked at bacteria, protists, sperm cells, blood, nematodes, and rotifers.

Little “animacules”

Robert Hooke (1635-1703)

His microscope

His handsome face

Hooke saw:

Cork “Cells”

First to coin the term

“cells”

Theodor Schwann (1810-1882)

Animals were also made of cells

Robert Brown (1773-1858)

Discovered the nucleus

Matthias Schleiden (1804-1881)

Cell’s nucleus played a role in reproduction

Rudolf Virchow (1821-1902)

Born in Pomerania

Animal and plant cells are produced only by the division of cells that already exist

Cell Theory

All living things are composed of cells

Cells are the smallest working units of living things

All cells come from preexisting cells by cell division