CK-12 Foundation
Ck 12: Life Science: Excretory System Problems
[Free Registration/Login may be required to access all resource tools.] The urinary system controls the amount of water in the body and removes wastes. Any problem with the urinary system can also affect many other body systems. Learn...
CK-12 Foundation
Ck 12: Life Science: Urinary System
[Free Registration/Login may be required to access all resource tools.] Sometimes, the urinary system is called the excretory system. But the urinary system is only one part of the excretory system. Recall that the excretory system is...
CK-12 Foundation
Ck 12: Biology: Urinary System
[Free Registration/Login may be required to access all resource tools.] Introduces the components of the urinary system.
Sophia Learning
Sophia: Organ Systems
A video lesson explaining the structure and function of the human body's major organ systems. [5:58]
CK-12 Foundation
Ck 12: Biology: Excretory System Diseases
[Free Registration/Login may be required to access all resource tools.] Covers some common kidney diseases and dialysis.
CK-12 Foundation
Ck 12: Biology: Excretion
[Free Registration/Login may be required to access all resource tools.] Describes organs of the excretory system and their roles.
National Health Museum
Access Excellence: Graphing Frog Respiration
This is a lesson plan for a science lab recording and graphing the respiration of frogs. Includes background information for teachers, preparation information, and detailed explanation of the activity.
CK-12 Foundation
Ck 12: Life Science: Excretion
[Free Registration/Login may be required to access all resource tools.] You might have noticed that sometimes your urine is darker than usual. This can happens when your body is low on water and trying to reduce the amount of water lost...
CK-12 Foundation
Ck 12: Biology: Kidneys
[Free Registration/Login may be required to access all resource tools.] Describes the roles of the kidneys in homeostasis.