OpenStax
Open Stax: Anatomy & Physiology: Water Balance
Learn how water levels in the body influence the thirst cycle and body fluid regulation. Find out about dehydration and identify common causes of dehydration.
TeachEngineering
Teach Engineering: Nautical Navigation
In this activity, students explore the importance of charts to navigation on bodies of water. Using one worksheet, students learn to read the major map features found on a real nautical chart. Using another worksheet, students draw their...
CK-12 Foundation
Ck 12: Excretion
[Free Registration/Login may be required to access all resource tools.] Toxic waste must be disposed of properly or there can be serious consequences. It is the same with your body--your waste needs to be removed from you. And that is...