The epidermis is a protective barrier for _____________, but not for _____________.
Added by William S.
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The epidermis is the outermost layer of the skin and acts as a protective barrier primarily against environmental factors such as pathogens (bacteria, viruses), physical injury, and water loss. Show more…
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The epidermis (epithelium of the cutaneous membrane or skin) is a keratinized stratified squamous epithelium. Explain why that epithelium is much better suited for protecting the body's external surface than a mucosa consisting of a simple columnar epithelium would be.
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alveolar macrophages microbiota Paneth cells GALT peristalsis gastrointestinal respiratory skin MALT sebum The ________ is the primary protective barrier against potential pathogens. Keratin and ________ on the outer layer make the skin waterproof and virtually impenetrable by most microbes. The ________ also contribute to the defenses by outcompeting for resources. Constant inhalation makes the ________ tract vulnerable to attack by microbes. ________ bathes the inner lining with sticky mucous to trap invaders and prevents them from descending to the lungs. In the event of a breach, ________ lie in wait. Our constant need for nutrients means that with every bite we consume, thousands of potential pathogens are entering our system. The stomach has very ________ pH, however many pathogens are protected by the food particles that carry them. Fortunately ________ provide an onslaught of enzymes, cells, and molecules to purge microorganisms with the help of ________.
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