Curated OER
The Excretory System
In this excretory system worksheet, 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 describe how...
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.