This organism consists of a single cell with several flagella. Is it a prokaryote, such as a bacterium? Actually, it’s larger than a prokaryotic cell, and it also has a nucleus. Therefore, this organism belongs to the domain Eukarya, the domain that includes humans. This particular eukaryote is one of the smallest, simplest organisms in the domain, called a protist. It’s scientific name is Giardia lamblia. As a human parasite, it can make us sick.
In this chapter, you’ll read more about protists like Giardia lamblia. You’ll discover that protists have a wide diversity of traits and ways of life. And only some of them make us sick.
For first Table in chapter 14, from top to bottom,
- Amoeba image courtesy of Pearson Scott Foresman.http://commons.wikimedia.org/wiki/File:Amoeba_%28PSF%29.png. Public Domain.
- Paramecium image by Antonio Guillén (PROYECTO AGUA / WATER PROJECT).http://www.flickr.com/photos/microagua/3623036432/. CC-BY-NC-SA 2.0.
- Giardia image courtesy of Janice Carr/Centers for Disease Control and Prevention.http://commons.wikimedia.org/wiki/File:Giardia_lamblia_SEM_8698_lores.jpg. Public Domain.
- Plasmodium image courtesy of Centers for Disease Control and Prevention.http://commons.wikimedia.org/wiki/File:Plasmodium.jpg. Public Domain.
For second Table in chapter 14, from top to bottom,
- Ed Bierman. http://www.flickr.com/photos/edbierman/2586036246/. CC-BY 2.0.
- Image copyright amrita, 2010. http://www.shutterstock.com. Used under license from Shutterstock.com.
- Marco Spiller. http://www.flickr.com/photos/marcospiller/5090039286/. CC-BY-NC-SA 2.0.
- Image copyright MichaelTaylor, 2010. http://www.shutterstock.com. Used under license from Shutterstock.com.
For third Table in chapter 14, from top to bottom,
- Image copyright KtD, 2010. http://www.shutterstock.com. Used under license from Shutterstock.com.
- Image copyright Matt Antonino, 2010. http://www.shutterstock.com. Used under license from Shutterstock.com.
- Image copyright Knorre, 2010. http://www.shutterstock.com. Used under license from Shutterstock.com.

CK-12 Foundation is licensed under Creative Commons AttributionNonCommercial 3.0 Unported (CC BY-NC 3.0)”
• Terms of Use • Attribution