National Cancer Institute at the National Institutes of Health
Seer Training Modules: Cells, Tissues, and Membranes
Self-guided learning activity where students learn about cell structure and function, different types of tissues, and various kinds of membranes in the body. There is a short quiz at the end of the lesson to check for understanding.
CK-12 Foundation
Ck 12: Life Science: Barriers to Pathogens
[Free Registration/Login may be required to access all resource tools.] Your body has many ways to protect you from pathogens. Your body's defenses are like a castle. The outside of a castle was protected by a moat and high walls. Inside...
Akron Children's Hospital
Akron Children's Hospital: Kidshealth: When Sinuses Attack
Sinuses are hollow spaces in your head that can fill with mucus when you're all stuffed up. Find out more in this article for kids.
Khan Academy
Khan Academy: What Is Inflammatory Bowel Disease?
Inflammatory bowel diseases are chronic relapsing disorders that cause inflammation within the gut, which damages the gut lining. The vast majority of inflammatory bowel disease is due to either ulcerative colitis or Crohn's disease....