Cells. Organelles. CELL. The basic unit of structure & function in living organisms. Anton Van Leeuwenhoek. 1632-1723 Was a merchant that ground up glass to make lenses. Invented microscope Made over 500 in his lifetime 1 st person to examine bacteria.
Was a merchant that ground up glass to make lenses
The cell theory states:
B. Cells are the basic units of structure & function in living things
C. All cells come from preexisting cells
High Power Objective
Low Power Objective
Scanning Power Objective
This is an air bubble
under the microscope!!!
Electron microscopes – capable of revealing details as much as 1000 times smaller than those visible in light microscopes. (Two types -TEM & SEM)
TEM – can explore cell structure and large protein molecules.
Downside – the specimens have to be sliced thinly
S.E.M. – Scanning electron microscopes –
specimens do not have to be cut thinly – a beam of electrons scans over the specimen.