by Paragragh
The skin is the "first line of defense".
self-defense
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.
Your body's third line of defense is specific defenses, such as the immune response.
The question is unclear but you may be describing a "Self-Defense" defense.
exceed local need
last line of defense
The first line of defense includes the skin, breathing passage, mouth and stomach.
A 5 line poemwith a structer like 1st line= 1 word- noun 2nd line= 2 words- describe the noun 3rd line=3 words-actions 4th line=4 words- feelings 5th-1 word- noun- must be different from the 1st one
layoffs at a large defense contracting company
there are actually three categories of defenses in the body, namely: first line of defense, second line of defense and the third line of defense.first line of defense is our skin. the vaccine you're talking about falls under the second line of defense because it involves the immune system wherein these vaccines were introduced into the body,nonetheless, the cells on our body creates/secretes chemicals that serve as defense mechanism; and the third line of defense is the use of medications or chemicals prescribed by the doctors.