<img src="https://d5nxst8fruw4z.cloudfront.net/atrk.gif?account=iA1Pi1a8Dy00ym" style="display:none" height="1" width="1" alt="" />
Dismiss
Skip Navigation
Our Terms of Use (click here to view) and Privacy Policy (click here to view) have changed. By continuing to use this site, you are agreeing to our new Terms of Use and Privacy Policy.

Barriers to Pathogens

Introduces the immune system's first line of defense, the skin and mucous membranes.

Atoms Practice
Estimated1 minsto complete
%
Progress
Practice Barriers to Pathogens
Practice
Progress
Estimated1 minsto complete
%
Practice Now
Barriers to Pathogens
teacher Contributed
Come up with questions about a topic and learn new vocabulary words to determine answers using an Ask, Answer, Learn table.
Please wait...
Please wait...