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sergey [27]
3 years ago
11

Describe three parts of the first line of defense that the body uses to protect itself

Health
1 answer:
Vlad [161]3 years ago
6 0

Goal of 1st line of defense: to prevent pathogen from entering body

There are physical and chemical barriers where all exposed body entrances would be. Ex. Skin, mouth, eyes, nostrils.

-The skin: composed of tough dead cells that are constantly shedding- physical barrier bc it prevents pathogen from latching on. Skin also contains sweat and oil glands that secrete acids and oils that prevent the growth of pathogens- chemical barrier. Also, sweat contains lysozyme.

Saliva and tears: protect the mouth and the eyes from pathogen invasion. Saliva and tears contain lysozyme.

Nostrils, digestive + respiratory tracts lined with another barrier: mucous.

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