How does the integumentary system prevent infection?
Integument consists of stratified epithelium mostly. This is primary non specific defence.
Integument works as outer wall of Fort. Stratified epithelium has densely arranged flat cells. These flat keratin cells cannot be penetrated by microorganisms. Sebum, oil is secreted in integument glands. Microorganisms are entangled in sebum and oil. This is another mechanism against infection.
This is the reason to prevent infection with open wound and in burns.