Epithelial cells in the skin, digestive, respiratory, and genital tracts secrete chemicals that prevent infection.

Authors

• Person: Not available Organization: Children's Hospital of Philadelphia
  Parts of the Immune System | Children's Hospital of Philadelphia

Sources

• Parts of the Immune System | Children's Hospital of Philadelphia www.chop.edu Children's Hospital of Philadelphia via serper

Referenced by nodes (2)

• chemicals concept
• infection concept