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  2. Respiratory tract antimicrobial defense system - Wikipedia

    en.wikipedia.org/wiki/Respiratory_tract...

    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 ...

  3. Lines of Torres Vedras - Wikipedia

    en.wikipedia.org/wiki/Lines_of_Torres_Vedras

    The Lines of Torres Vedras were lines of forts and other military defences built in secrecy to defend Lisbon during the Peninsular War.Named after the nearby town of Torres Vedras, they were ordered by Arthur Wellesley, Viscount Wellington, constructed by Colonel Richard Fletcher and his Portuguese workers between November 1809 and September 1810, and used to stop Marshal Masséna's 1810 ...

  4. Tactical formation - Wikipedia

    en.wikipedia.org/wiki/Tactical_formation

    Line; Skirmish; Square; Stack [4] Staggered column; V formation; Vanguard; Wedge and inverted wedge; File: The file formation is used in elements of up to a platoon size. A file formation is used for close terrain, often in dense vegetation or when there is low visibility.

  5. Dragon's teeth (fortification) - Wikipedia

    en.wikipedia.org/wiki/Dragon's_teeth_(fortification)

    Russian anti-tank obstacles near the horizon, Kherson Oblast, May 2022. Dragon's teeth on the left, Czech hedgehogs on the right In Belgorod Oblast, defensive lines of dragon's teeth were constructed in October 2022 under the supervision of the Wagner Group along the Russia–Ukraine border, intended as a second line of defense alongside trenches and a trained militia in the event the ...

  6. Interior lines - Wikipedia

    en.wikipedia.org/wiki/Interior_lines

    Interior lines [a] (as opposed to exterior lines) is a military term, derived from the generic term line of operation or line of movement. [1] The term "interior lines" is commonly used to illustrate, describe, and analyze the various possible routes (lines) of logistics, supply, recon, approach, attack, evasion, maneuver, or retreat of armed forces.

  7. Defense line - Wikipedia

    en.wikipedia.org/wiki/Defense_line

    A defense line or fortification line is a geographically recognizable line of troops and armament, fortified and set up to protect a high-value location or defend territory. A defense line may be based on natural difficult terrain features, such as rivers or marshes, mountain ranges, or coastlines; temporary field fortification works such as ...

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  9. Innate immune system - Wikipedia

    en.wikipedia.org/wiki/Innate_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). [ 2 ] The major functions of the innate immune system are to:

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