Grace's Timeline

Jansen invents the microscope

Jan 1, 1590

Without the microscope we would never no about or could see cells.

Leeuwenhoek discovered animalcules "micro organisms" and found bacteria

Jan 1, 1676

If Leeuwenhoek didn't discover animalcules we would not know anything about microorginisms or bacteria and people would end up sick and not know why

Oken came up with new system of animal classification

Jan 1, 1802

If that never happened then the new animals discovered would not fit in to any existing classification

Hooke, observed cork cells and used microscopes

Jan 1, 1802

Sketches appeared of micrographia

Brown first recognized the fundamental diference between gymnosperms and angiosperms

Jan 1, 1823

He also did some studies in palynology

Schleiden part of cell theory

Jan 1, 1838

He stated all living things are made of cells

Schwann says cells are the basic unit of animal structure

Jan 1, 1839

With out this they wouldnt have known what the basic unit of plants and animals are made of.

Roelliker carried out research on the nervous system

Jan 1, 1840

Documenting the connection between nerve fibers and cell bodies and they are attached.

Pasteur discovered two crystals

Jan 1, 1848

Mirror images of each other

Virchow extended work of cell theory

Jan 1, 1854

Proposed living cells must rise from pre-existing cells

Scheme idem Part of cell theory

Oct 23, 2014

Aristotle, desertion of oganisms- aristotllecunsiderea

Mar 2, 2022

The investigation of living things expesially animals