This resource provides general information about the human excretory system and kidneys, and a section only about nephrons. It includes several pictures, diagrams and explanations for understanding.

Great learning exercises to check your understanding of the kidneys. Complete this problem set and if you miss an answer you are taken to a tutorial that is very useful. This is a good site to use for research as well as checking for...

A complete, self-paced lesson on homeostasis in the human body, focusing on kidney function. Students work their way through illustrated and animated tutorials, and answer review questions along the way. There is a self-checking quiz at...

This site provides articles about kidneys and kidney diseases, along with other topics about the kidneys and the urinary system from the National Library of Medicine. You can find everything you may need here, from statistics to...

Read this passage and study the graphics; then take the five-question quiz over measuring glomerular filtration rate of the kidneys with insulin.

An online biology textbook on the structure and function of the kidneys. Full of labeled, color diagrams for better understanding.

After drinking a few glasses of water on a hot day, you might be struck with a sudden urge. Behind that feeling are two bean-shaped organs that work as fine-tuned internal sensors. This video describes how the incredible kidneys balance...

[Free Registration/Login may be required to access all resource tools.] In this interactive tutorial students will explain how the urinary system filters blood and excretes wastes.

If you've ever wondered where urine comes from, this movie and activity guide has the answer! [5:14]

Answer these seven multiple choice questions about osmotic regulation in the Urinary system.

Answer these seven questions about osmotic regulation in the Urinary system. After hitting submit, review the concepts tested.

[Free Registration/Login may be required to access all resource tools.] Discusses how the urinary system filters blood and excretes wastes.

[Free Registration/Login may be required to access all resource tools.] Discusses how the urinary system filters blood and excretes wastes.

[Free Registration/Login may be required to access all resource tools.] Discusses how the urinary system filters blood and excretes wastes.