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cells

Cells
Image: iStockphoto.com/Henrik5000

Cells

You have about 100 trillion cells. Yet each is like a city, full of complicated parts that work together. One part generates power, another makes proteins, another recycles waste… DNA is like the government.

Some cells live alone. But those that make up the bodies of plants and animals take on specific tasks. Some make up muscle, some skin… You’re reading these words with (yep, you guessed it) your cells.

BBC
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CellCraft

CellCraft

Try your hand at building a single-celled organism by acquiring the necessary ingredients -- organelles, energy, and others -- in this game. More...

Game
Carolina Biological Supply
Slaves to Evolution

Slaves to Evolution

The mitochondria in our cells, which turn our food into stored energy, seem to have come from an ancient meal — during which one bacterium ate another. More...

Article
ABC
Control of the Cell Cycle

Control of the Cell Cycle

As cells grow and divide, they go through a series of phases. Find out what they are, then step inside the nucleus to see if you can make everything happen in the right order. More...

Interactive
The Nobel Foundation
Interactive Animal & Plant Cells

Interactive Animal & Plant Cells

What are the parts of a plant or animal cell and what does each part do? This interactive resource shows and tells. More...

Interactive
Quill Graphics
The Wacky History of Cell Theory

The Wacky History of Cell Theory

What led to our understanding of cells? Was it scientists spending long, boring hours in their labs? How about feuds, fights, and tooth gunk? Check out this video. More...

Profile
TED-Ed/Lauren Royal-Woods
Cell Membrane

Cell Membrane

The cell membrane is far more than a simple wrapper. It carefully controls what moves into and out of the cell. How? Use this interactive resource and see. More...

Interactive
WGBH/PBS
Cell Explorer

Cell Explorer

Although they differ in size and shape, most of the cells in animals and plants have the 5 parts shown here. Click on each part for a brief description. More...

Interactive
WGBH/Exploratorium
Cell Structure and Function: Chart

Cell Structure and Function: Chart

Here's a handy guide to the parts that make up plant and animal cells. Discover what each part looks like and does. More...

Article
Biology Junction
Cell Structure and Function: Quiz

Cell Structure and Function: Quiz

If you get a wrong answer on this helpful cell quiz, you can learn from your mistake immediately. More...

Interactive
Quill Graphics
Eukaryopolis: The City of Animal Cells

Eukaryopolis: The City of Animal Cells

This site really lives up to its name. It's a crash course in the cell and its parts, and why it's like a city. For a wild ride, click here. More...

Video
CrashCourse
How Small Is a Cell?

How Small Is a Cell?

Check out this video that won the Student Grand Prize in the How Small Is a Cell Project ED contest. More...

Video
ProjectEd
Mitosis: The Amazing Cell Process that Uses Division to Multiply!

Mitosis: The Amazing Cell Process that Uses Division to Multiply!

If your cells didn't divide, you couldn't grow or heal. But copying all that DNA isn't easy. More...

Video
Amoeba Sisters
Neurons Could Outlive the Bodies that Contain Them

Neurons Could Outlive the Bodies that Contain Them

Most of the cells in your body only live for weeks or months. Brain cells (neurons) are the big exception. More...

Article
National Geographic
Scientist Profile: Nanoparticle Safety Scientist

Scientist Profile: Nanoparticle Safety Scientist

Christy Haynes studies the effects of different nanoparticles on our immune system. She hopes her research will lead to "design rules" for nanoparticles that will guarantee their safety. More...

Profile
DragonflyTV/PBS
The Cell Secret Immune System

The Cell Secret Immune System

It's a timeless battle: Virus vs. Human. See how your immune system fights a virus — even after it gets past the cell membrane, using the protein TRIM21. More...

Video
BBC

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