Cells
Cells are the building blocks of living things.
A cell is the smallest independent unit of a living thing.
Robert Hooke
Robert Hooke was the first scientist to
discover cells.
In 1665, he used a microscope and
observed cork.
In the cork, he noticed little rooms,
or “cells,” like monks lived in.
This is how cells were named.
Quick Check
What are the smallest building blocks of living things called?
Who was the first scientist to discover cells?
Cell Theory
As scientists continued to study cells, they realized that:
1
All living things are made of cells.
2
A cell is the smallest unit of life.
3
Cells make more cells.
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Cell Theory
Cells are made of even smaller parts.
These parts are like the organs of your body:
they have a specific purpose.
Cell parts are called "organelles."
Click to enlarge!
Golgi body
Cell Theory
There are even different types of cells.
For example, animal cells and plant cells are different from each other.
Found in both cells
Found in plant cells only
permanent
vacuole
cell membrane
chloroplast
cytoplasm
cell wall
nucleus
Animal Cell
Plant Cell
Cell Analogy
Building blocks are to a structure, as
cells
are to living things.
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answer!