Transcript Final Tech Project

A Cell’s Life
Fun Fact of The Day
The average human being is composed of
around 100 Trillion individual cells!!!
It would take as many as 50 cells to cover
the area of a dot on the letter “i”
WOW!!!
Discovery of Cells
1665- English Scientist, Robert Hooke, discovered cells while
looking at a thin slice of cork.
He described the cells as tiny boxes or a honeycomb
He thought that cells only existed in plants and fungi
The Cell Theory
The 3 Basic Components of the Cell Theory
1. All organisms are composed of one or more
cells.
2. The cell is the basic unit of life in all living
things.
3. All cells are produced by the division of
preexisting cells.
The Cell Theory Rap
Listen close to the story I tell.
It's the rapping story of the living cell.
It's a happy tune that's sort of cheery.
About a real tough topic called the cell theory.
All animals, plants, and protists too,
Are made of cells with different jobs to do.
They're the basic units of all organisms,
And I hope by now you got the rhythm.
It all started with one dude named Hooke.
Who at some cork cells took a look.
He used a scope and took his time.
'Cause a cell is small and thinner than a dime.
Say 1, 2, 3, 4,
Are you ready to learn some more?
The animal cell has many parts,
And you must know each one by heart.
Like the farmer man in the dell.
The nucleus controls the cell.
its gives the orders -- kind of like a brain.
And it's protected by a nuclear membrane.
Around the cell, you'll find another "skin,"
The cellular membrane holds the whole cell in
But its job isn't simple there's no doubt,
It lets some particles go in and out.
Now please don't lose your science enthusiasm,
Listen to the story of the cytoplsm.
All around the cell this thick fluid does go,
But in the nucleus it will not flow.
And don't forget those ribosomes This is where proteins come from.
These protein factories are so small, you'll agree,
You need an electron microscope to see.
Just when you thought you weren't having any fun,
Along comes teh endoplasmic reticulum.
These tubelike structures serve as a track,
To carry stuff to the membrane and back.
Now have you ever seen any doughnuts without holes?
In a cell, they're called vacuoles.
They're filled with stuff like H2O
And they carry food so the cell can grow.
Las of all, but not the very least,
Mitochondria - mighty cellular beasts,
Since they turn sugars into energy so well,
We call them the powerhouse of the cell.
Now my friend, you know it well,
The unforgettable story of the living cell.
Cell Video
Cell Organelles
Organelle= “little organ”
Found only inside
eukaryotic cells
All the stuff in between
the organelles is cytosol
Everything in a cell
except the nucleus is
cytoplasm
REVIEW
Cell Membrane
Boundary of the cell
Made of a phospholipid bilayer
Go
BACK
Nucleus
Control center of the
cell
Contains DNA
Surrounded by a
double membrane
Usually the easiest
organelle to see under
a microscope
Usually one per cell
Go
BACK
Endoplasmic
Reticulum
A.k.a. “ER”
Connected to nuclear
membrane
Highway of the cell
Rough ER: studded
with ribosomes; it
makes proteins
Smooth ER: no
ribosomes; it makes
lipids
Go
BACK
Ribosome
Site of protein
synthesis
Found attached to
rough ER or floating
free in cytosol
Produced in a part of
the nucleus called the
nucleolus
That looks familiar…what is a
polypeptide?
Go
BACK
Golgi Apparatus
Looks like a stack of
plates
Stores, modifies and
packages proteins
Molecules transported
to and from the Golgi
by means of vesicles
Go
BACK
Mitochondria
“Powerhouse of the
cell”
Cellular respiration
occurs here to release
energy for the cell to
use
Bound by a double
membrane
Has its own strand of
DNA
Go
BACK
Chloroplast
Found only in plant
cells
Contains the green
pigment chlorophyll
Site of food (glucose)
production
Bound by a double
membrane
Go
BACK
Cell Wall
Found in plant and
bacterial cells
Rigid, protective
barrier
Located outside of the
cell membrane
Made of cellulose
(fiber)
Go
BACK
Quick Review
Which organelle is the control center of the cell?
Nucleus
Which organelle holds the cell together?
Cell membrane
Which organelles are not found in animal cells?
Cell wall, central vacuole, chloroplasts
Which organelle helps plant cells make food?
Chloroplasts
What does E.R. stand for?
Endoplasmic reticulum
Now For A GAME