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By: Patty Harris
W.L. Swain Elementary
 Organisms
contain cells,
such as blood cells.
 Organisms
are mostly made
up of cells that work
together
 Cells
are too small and
numerous to observe.
 Many
cells such as onion
skin cells and cheek cells
can be viewed with
magnification.
Many cells cannot be seen with the
naked eye.
 Animal and plant cells are structured
differently

Organisms can be single-celled or
multi-celled
 Some objects are too small to be seen
without magnification.

Microscopes make it possible to see
that living things are made up mostly
of cells.
 Some organisms’ cells vary greatly in
appearance and perform very different
roles in the organisms.


Some organisms are made of a
collection of similar cells that benefit
from cooperating.
 DNA
is contained in the nucleus
of the cell.
 Bacteria
does not have a nucleus.
 Multi-celled
organisms have
groups of cells that work together
to form tissues and organs.

A virus is not a cell, but it can
reproduce.

Cells are the building blocks of life.

All living things are made of cells.

Robert Hooke was the first person to
discover cells.