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when it gets past the first line (the skin)
the integumentary system is the skin and the bodys first line of defense.
Your skin is the first line of defense.
Well, you first get infected from a scratch or bite, then the infection spreads into the bloodstream, getting by the first line of defence. The second line of defence, would be the white blood cells. They try overcome or "swallow" the infection. the third line of defense, is the anitgens. If all else fails, your f*cked.
its killer T cells
when the first and the second lines of defense have already been overcome.
Next in line is the Vice President, followed by the Speaker of the House.
iambic pentameter
The skin is the "first line of defense".
interferons
skin and mucous membranes first line of defense second line-leukocytes and macrophages, inflammation and fever third is immune system
In the immune system, the first line of defense are mechanical and physical barriers, such as the skin and the cornea of the eye. The main line of defense, meanwhile, are the innate immunity and acquired immunity of an organism.