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Descripción
Mapa Mental por Amy Findell, actualizado hace más de 1 año
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Creado por Amy Findell
hace más de 6 años
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Biology - Chapter 1
- Cell Structure and Transport
- All living things are made up of cells, but some cells are so
small you can only see them using a mircoscope
- 1 kilometre (km) = 1000 metres (m)
- 1 m = 100 centimtres (cm)
- 1 cm = 10 millimetres (mm)
- 1 mm = 1000 micrometers (µm)
- 1 µm = 1000 nanometres (nm)
- Mircoscopes
- Light microscopes
- The first light microscopes were developed in the mid-17th
century
- Light mircoscopes use a beam of light to form an
image of an object and the best can magnify around
2000 times
- Light microscopes are relatively cheap and can be
used almost anywhere.
- The first light microscopes were developed in the mid-17th
century
- Electron mircoscopes
- The invention of electron
mircoscopes in the 1930s allowed
biologists to see and understand
more about the sub cellular
structures inside cells.
- The electron mircoscope uses a beam of
electrons to form an image and can magnify
objects up to around 2000000 times.
- Electron microscopes are large, very
expensive and have to be kept in a special
temperature, pressure and
humidity-controlled rooms.
- The invention of electron
mircoscopes in the 1930s allowed
biologists to see and understand
more about the sub cellular
structures inside cells.
- Light microscopes
- All living things are made up of cells, but some cells are so
small you can only see them using a mircoscope
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