Unit 3: cells
Lesson 3.1 cell
A cell is
the smallest unit of life.
We can use
microscope to observe cell.
Some type
of cells: cheek cells, red blood cells, leaf cells, brain cells.
Non-living
thing do not made up of cells.
Lesson 3.2 Unicellular organisms
Unicellular
organisms only made up from one cell.
Example of
unicellular organism: yeast, bacteria, paramecium
Lesson 3.3 multi cellular organisms
Multi cellular
organisms made up of many cells.
Small
number of cells: algae and mosses
Millions of
cells: human, animal, plants.
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