First Line of Defense Prevent Entry

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Presentation transcript:

First Line of Defense Prevent Entry

1st Line of Defense (Non-specific) Skin - Fortress or Gate In order for a pathogen to invade our body, it must first breach our skin.

Skin Epidermis - outer layer of skin. Constantly sloughs off and prevents bacteria from colonizing Sweat and oils contain anti-microbial chemicals

1st Line of Defense (Non-specific) Mucus & Cilia Mucus contains enzymes that destroy bacterial cell walls Cilia moves mucus with trapped pathogens out of body

1st Line of Defense (Non-specific) Saliva Saliva contains chemicals that break down and destroy pathogens

1st Line of Defense (Non-specific) Stomach Acid Stomach Acid breaks down swallowed pathogens The stomach is lined with a special mucus to prevent damage

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