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Cell structure and function
Cell structure and function
Cell structure and function
Cell structure and function
Cell
Cell Structure
structure and
and Function
function
Cell structure and function
Cell structure and function
Cell structure and function
Cell structure and function
Cell structure and function
• Cells are the ‘building blocks’ of living
organisms.
• Cells are so small that you need a
microscope to see them.
• All cells have the same overall structure (cell
membrane, cytoplasm and a nucleus) that
allow them to carry out the basic life
processes - but some are changed to carry
out certain functions.
Plant cells
• The epidermal cells are
surrounded by cellulose
cell walls which gives plant
cells their regular shape.
• No vacuole can be seen
as there is no coloured
substance in it.
• There are no chloroplasts
as the cells are from inside
the onion bulb.
Plant cells
• Chloroplasts are clearly
visible in these cells
from Elodea (pond
weed).
• Chloroplasts are the
structures that contain
the green pigment
chlorophyll.
• Chlorophyll captures
light energy needed for
photosynthesis.
What are parts of a typical plant
cell called?
Animal cells
• Human cheek cells
(flattened epidermal cells)
stained with methylene
blue and magnified x 200.
• Nucleus, granular
cytoplasm and cell
membrane can be clearly
seen.
• Animal cells have an
irregular shape.
What are the parts of a typical
animal cell called?
Comparing animal and plant cells
The cell – a living factory
The cell – a living factory