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Anatomical "lines", or "reference lines," are theoretical lines drawn through anatomical structures and are used to describe anatomical location. The following reference lines are identified in Terminologia Anatomica: Anterior median line; Lateral sternal line: A vertical line corresponding to the lateral margin of the sternum.
In the first line of defense, inhaled bacteria are trapped by mucus and are swept toward the pharynx and are swallowed. [1] Bacteria which penetrate the mucous layer are dealt with a second line of defense which includes antimicrobial peptides that are secreted by the surface epithelium of the respiratory tract which kill many strains of ...
Diagram of the penetration manouver. Figure 2-4 from Army Training Publication (ATP) 3-21.8: Infantry Platoon and Squad. In ground attack position, penetration is the breaching of, and moving past, a defensive military line. [1] Penetration is a strategic military maneuver much like the pincer movement with a few differences.
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The innate immune system or nonspecific immune system [1] is one of the two main immunity strategies in vertebrates (the other being the adaptive immune system). The innate immune system is an alternate defense strategy and is the dominant immune system response found in plants , fungi , prokaryotes , and invertebrates (see Beyond vertebrates ).
Defence in depth (also known as deep defence or elastic defence) is a military strategy that seeks to delay rather than prevent the advance of an attacker, buying time and causing additional casualties by yielding space. Rather than defeating an attacker with a single, strong defensive line, defence in depth relies on the tendency of an attack ...
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Roman military tactics evolved from the type of a small tribal host-seeking local hegemony to massive operations encompassing a world empire. This advance was affected by changing trends in Roman political, social, and economic life, and that of the larger Mediterranean world, but it was also under-girded by a distinctive "Roman way" of war.