discoveries

➤ DISCOVERIES

● 1665 – Robert Hooke [English Scientist]

• First designed & used microscope

• Dead cork Cell (Small boxes, Honey Comb)

• Cellulae (Singular - cellula): Little Rooms – Shortened to Cells (Single-cell)
  → Indicated cause: living organisms consisted of smaller structures

● 1674 – Anton van Leeuwenhoek (short – A.V. or A.V.L.) [Dutch Scientist]

• Studied Living Cells

• Made an improved microscope

● 1831 – Robert Brown [Scottish Botanist]

• Discovered, Named – Nucleus

● 1839 – J.E. Purkinje – Protoplasm (living substance in cell)

● Cell Theory – Two German Biologists

→ Basic unit

→ Cell is the structural unit of life

● 1838 – M.J. Schleiden [Botanist]

● 1839 – T. Schwann [Zoologist]

→ All living organisms are composed of cells

Later expanded by Rudolf Virchow [German Pathologist] – 1855

→ All cells exist from pre-existing cells