Technology provides biologists with new tools to study living and non-living specimens. Microscopes use light and lenses to provide enlarged images, with scanning electron microscopes using electrons to generate 3D images of non-living surfaces. Transmission electron microscopes also use electrons to create flat, highly magnified images that can see viruses and nanoparticles by transmitting beams through dead specimens. Imaging technology in medicine includes X-rays to view dense bones and teeth, magnetic resonance imaging to show detailed images of organs and tissues, and functional MRI to measure brain activity.

1. Tools & Technology
In BIOLOGY
Dr. G.D. HANDE
Dept. of ZOOLOGY
Shri. Shivaji Science College
Amravati.

16. Technology continually changes the way
biologists work.
A microscope provides an enlarged image of an
object.
•Uses light and two lenses, LIVING SPECIMEN
KEY CONCEPT
scanning electron microscopes
(SEM) scans surface with electrons,
occurs in a vacuum, non-living
specimen 3D Images

17.  transmission electron microscopes
(TEM) Flat Image
 Beam of electrons are transmitted
through the dead specimen,
 Can see viruses, atoms and
Nanoparticles!
 Magnifies millions of times!
stoma

18. Imaging technology is used in medicine
X-ray images
use x-rays (electromagnetic
wave of high energy) to show
dense materials, bones
and teeth
- Does NOT show soft tissue

19. magnetic resonance
imaging (MRI)
Uses a strong
magnetic field and a
computer to show
detailed images of
organs and tissues

20. functional MRI (fMRI)
Uses a magnetic field
To measure activity in
The brain