Wow you don't know? Look it up on a book and get a life. Lol just kidding around. They are your skin, tears, saliva, earwax, and mucus. Oh and sorry about the joke I didn't mean to say it.
Chemical fume hoods are the first protection against exposure to dangerous chemicals that all laboratory users should have. They are the first line of defense against inhaling chemicals.
On the surface of stainless steel an ultrathin layer of chromium oxide after the contact with oxygen; this layer has the role of protection against rusting.
Chlorine resistant swimwear protects against chlorine by having a high polyester content, which does not become destroyed by chlorine. 100% polyester swimwear keeps its color and its shape, not like Spandex or nylon.
The current types of metal that may be galvanized include steel and iron. They are usually galvanized with zinc. This protects against corrosion and adds robustness to the metal.
I would recommend against it as it is illegal, but you would need zinc and heat to turn a copper penny to brass.
True
The immune system is a network of cells tissues organs and chemicals that fight pathogens. This is how the body keeps healthy and defends against invading illnesses.
The skin protects against pathogens, however a disorder can always find a way in.
the white blood cell protects the body against invading pathogens.
the dermal tissue of plants and hard cuticle covering protect the plant body from invasion of parasites and other harmful agents
The mucous membranes lining the nose, mouth, lungs, and urinary and digestive tracts provide another nonspecific barrier against potential pathogens. Mucous membranes consist of a layer of epithelial cells bound by tight junctions.
Because the skin protects you. It 'keeps out the dirtybugs' as my grandma likes to say.
a diseas that can be passed from one living thing to another is an infectious disease
The integumentary system (skin) and mucous membranes are the first line of defense. They provide a physical barrier against invasion of pathogens. Any break in this physical barrier, such as a cut, makes it easier for pathogens to enter your body.
the lincosamindes, clindamycin and lincomycin, which are highly active against anaerobic pathogens
the body's second line of defense against pathogens is the B cells.
how does residental normal flora protect the body against pathogens