![Most of the deaths from human cancers (90%) are due to cancer cells spreading and establishing colonies in other parts of the body.](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/resources/px_diseases.jpg)
![](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/transp.gif)
![](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/arro4.gif) |
CancerNet is a gateway to the most recent cancer information from the National Cancer Institute. It...
|
![](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/transp.gif) |
|
![](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/transp.gif) |
![Tendinitis is inflammation, irritation, and swelling of a tendon, which is the fibrous structure that joins muscle to bone.](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/resources/medline.jpg)
![](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/transp.gif)
![](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/arro4.gif) |
MEDLINEplus enables users to find information about hundreds of diseases, conditions, and wellness...
|
![](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/transp.gif) |
|
![](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/transp.gif) |
![This animation below shows how the heart's electrical system works.](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/resources/heart-lung.jpg)
![](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/transp.gif)
|
![](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/transp.gif) |
![DNA consists of two long, twisted chains made up of nucleotides. Each nucleotide contains one base, one phosphate molecule, and the sugar molecule deoxyribose. The bases in DNA nucleotides are adenine](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/resources/0666.jpg)
![](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/transp.gif)
![](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/arro4.gif) |
Genetic Basics looks at how genes work, exceptions to Mendel's rules, how DNA gets replicated, genes and...
|
![](https://webarchive.library.unt.edu/web/20090807165641im_/http://www.free.ed.gov/images/transp.gif) |
|