Cells:
The Basic Unit of Life
January
2014
Vocabulary
1. tissue-a group of cells that work
together to perform a specific job
2. organ- a group of 2 or more tissues
working together to perform a specific job
3. organ system- organs working together
in a group to perform specific jobs
4. organism-anything that can live on its
own
5. unicellular- organism that is a single cell
Vocabulary continued
6. multicellar- organism that is made of
many cells
7. population- group of organisms that are
the same kind and that live in the same
area
8. community- 2 or more different
populations living in the same area
9. ecosystem- the community and all nonliving things that affect it
Vocabulary continued
10. cell membrane- acts as a barrier
between the inside of the cell and the
cell’s environment
11. organelles-structures in a cell that
allow it to live, grow, and reproduce
12. cytoplasm-fluid in a cell that contains
the organelles
Vocabulary continued
13. nucleus- holds the cells DNA and is
the control center for the cell
14.prokayotic- cells that do not have a
nucleus
15. eukaryotic- cells with a nucleus
16. bacteria- singe celled organisms
without a nucleus
The discovery of cells
1. In 1665, a British scientist named
Robert Hooke discovered cells
2. He named them cells,
which means “little rooms”
In Latin
Cell Theory
- The foundation of biology
Cell Theory
1. All living things are made of cells
2. Cells are the basic structure and function of
all living things
3. All cells come from existing cells
Video
Compare and Contrast Eukaryotes
and Prokaryotes
Prokaryotic cell
 1. no nucleus
 2. no membrane-covered
organelles
 3. circular DNA
 4. Bacteria
Eukayotic cell
 1. nucleus
 2. membrane-covered
organelles
 3. linear DNA
 4. All other cells
Cell organelles
1. cell membrane- surrounds the cell,
keeps the cytoplasm inside and allows
nutrients to enter the cell and waste
products to exit the cell
Found in plant and animal cell
It’s function reminds me of ……….
Cell organelles
2. cell wall- made of cellulose, provides
strength and support to the cell membrane
Found in plant cells
It’s function reminds me of ……….
Cell organelles
3. nucleus- contains the cell’s DNA and is
the control center for the cell
Found in plant and animal cell
It’s function reminds me of ……….
Cell organelles
4. ribosomes- amino acids are hooked
together to make proteins
Found in plant and animal cells
It’s function reminds me of……..
Cell organelles
5. Mitochondria-break down food
molecules to make ATP (energy) “power
house”
Found in plant and animal cells
It’s function reminds me of……….
Cell organelles
6. chloroplasts-make food using the
energy from sunlight
Found in plant cells
It’s function reminds of ………
Cell organelles
7. endoplasmic reticulum- makes lipids
(fats), breaks down drugs, packages up
proteins for release from the cell
Found in plant and animal cells
It’s function reminds me of……
Cell organelles
8. golgi complex- processes and
transports materials out of the cell
Found in plant and animal cell
It’s function reminds me of…….
Cell organelles
9. Vacuole-stores water and other
materials
A large vacuole is found in plant cells, smaller
vacuoles are found in animals cells
It’s function reminds me of……..
Cell organelles
10. lysosomes- digest food particles,
wastes, cell parts and foreign invaders
Found in plant and animal cells
It’s function reminds me of……
Cell Organelles
11. CytoplasmFluid that holds the organelles
Found in plant and animal cells
It’s function reminds me of……