Microscopy & Cell Theory – Detailed Timeline by Shune Lei Shwe Yee

1625

thuzarhnin2017aug — 2025-08-07 06:49:04 UTC

The first microscope

What he did: Adapted his telescope design to make one of the earliest microscopes.
What it was like: Used a bi-convex objective lens and a bi-concave eyepiece, similar to his telescope.
Magnification: About 30x.
Name of device: He called it the “occhiolino” (Italian for “little eye”).
Why it matters: While Galileo didn’t invent the microscope or use it for biology much, his work laid groundwork for magnification tools.

thuzarhnin2017aug — 2025-08-07 06:54:43 UTC

1665 – Robert Hooke

What he did: Observed thin slices of cork using a compound microscope.
Discovery: He saw many tiny, box-shaped structures.
What he called them: “Cells”, because they reminded him of monks’ small rooms (cellulae).
Impact: First person to name and describe cells, even though he only saw the cell walls of dead plant cells.
Why it matters: This was the first step toward understanding that all living things are made of cells.

thuzarhnin2017aug — 2025-08-07 06:57:51 UTC

1670 – Antonie van Leeuwenhoek

What he did: Built simple, single-lens microscopes with powerful magnification (up to 270x).
How: Used tiny, hand-polished glass beads as lenses.
Discoveries: First to see and describe living microorganisms, including:
- Bacteria
- Sperm cells
- Protozoa
- Blood cells
Nickname: The “Father of Microbiology”.
Why it matters: He showed that an entire invisible world of life exists, launching the study of microbiology.

thuzarhnin2017aug — 2025-08-07 07:01:37 UTC

What he did: Studied plant cells under a microscope.
Discovery: Observed a dark structure in orchid cells and named it the nucleus.
Why it matters: The nucleus was later found to be the control center of the cell, making this a key discovery in cell biology.

thuzarhnin2017aug — 2025-08-07 07:02:58 UTC

Focus: Studied plants and their structure.
Conclusion: All parts of a plant are made of cells.
Partnered with: Theodor Schwann (who studied animals).
Why it matters: Together, Schleiden and Schwann helped create the foundation of the Cell Theory:
- All living things are made of cells.
- Cells are the basic unit of life.

thuzarhnin2017aug — 2025-08-07 07:04:27 UTC

What he did: Revised and expanded the Cell Theory.
New idea: Cells are not just structural, but also the functional units of life—meaning they carry out all the basic activities of living things.
Why it matters: Helped clarify that cells aren’t just building blocks—they actually do the work of life.

thuzarhnin2017aug — 2025-08-07 07:05:55 UTC

What he said: “Omnis cellula e cellula” — All cells come from pre-existing cells.
Why it was important:
- Went against the old idea of spontaneous generation (that life could come from non-living things).
- Showed that cells divide to make new cells.
- Helped prove that diseases start at the cellular level, leading to modern pathology.
Why it matters: Completed the modern Cell Theory.