Curated OER
The Excretory System
In this excretory system instructional activity, students read a brief excerpt about water balance and the excretory system. Then they identify what compound birds, insects and reptiles living in dry habitats excrete. Students also...
Wolfram Research
Wolfram Science World: Fredrich Wohler
A description of Wohler's life and his accomplishments in chemistry. Includes a picture.
Curated OER
Kids Health: What Kids Need to Know About Kidneys
This is a kid friendly look at what the kidneys look like, where they are, and what they do. Shockwave is needed for viewing.
National Institutes of Health
Niddk: The Urinary Tract & How It Works
This is an in-depth discussion on how the urinary system works. Also includes information about what can go wrong in the urinary system and how someone can get help.