Advertisement Upgrade to remove ads

cell theory 1

all organisms are made of one or more cells

cell theory 2

the cell is the basic unit of organization in organism

cell theory 3

all cells come from cells

Hooke

made the first microscope

brightfield microscope

light microscope, image viewed against bright background; most often used to study cells; up to 2,000x

darkfield microscope

image bright against dark background; up to 2,000x; details more visible than brightfield

Hooke microscope

up to 250x; historic, handheld, clear images of "beasties"

Flourescence microscope

up to 1,500x; specimen must be treated with special flourescent stain; certain cell structures and substances glow

Transmission electron microscope

aims a beam of electrons through specimen; up to 1,000,000x

Phase-contrast microscope

emphasizes differences in specimen's capacity to bend light waves; good for viewing living cells; up to 1,500x

Scanning electron microscope

sweeps beam of electrons over specimen causing other electrons to be emitted; realistic 3-D image; 200,000x

Zacharriar Janssen

first to look through a compound microscope

Antonie van Leeuwenhoek

made simple microscope with glass bead

Robert Hooke

saw box like things in cork called them cells

Matthias Schleider

said that all plants are made of cells

Theodor Schwann

said all animal cells are made of cells

Rudolph Virchow

said all cells come from a cell that existed before

the virus attaches to a specific host cell

virus #1

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set